Difficult logic puzzles for adults. Logic riddles for elementary grades. What does not burn in fire and does not sink in water

101 trick questions.

Target: development of logical connections
Can be used on classroom clocks, for fun competitions, competitions and contests, at the celebration of Laughter.
Designed for children of primary school age and older.

1. What does Boris have in front, and what does Gleb have in the back? (letter "b")
2. A grandmother was carrying a hundred eggs to the market, one (and the bottom) fell. How many eggs are left in the basket? (none because the bottom fell)
3. When is a person in a room without a head? (when sticking it out the window)
4. How do day and night end? (soft sign)
5. Which watch shows the exact time only twice a day? (who stopped)
6. Which is lighter: a kilogram of cotton wool or a kilogram of iron? (same)
7. Why do you go to bed when you want to sleep? (by gender)
8. What should be done to keep four guys in one boot? (remove one boot from each)
8. The crow sits, and the dog sits on the tail. Could it be? (the dog sits on its own tail)
9. When is the easiest time for a black cat to get into the house? (when the door is open)
10. In what month does chatty Masha speak the least? (in February, it is the shortest)
11. Two birches grow. Each birch has four cones. How many cones are there? (cones do not grow on a birch)
12. What happens to a blue scarf if you put it in water for five minutes? (get wet)
13. How to write the word "mousetrap" with five letters? (cat)
14. When a horse is bought, what is it like? (wet)
15. A person has one, a crow has two, a bear has none. What is it? (letter "o")
16. A flock of birds flew to the grove. They sat down two by two on a tree - one remained; sat down one at a time - one did not get. How many trees are there in a grove, and how many birds are in a flock? (three trees, four birds)
17. A woman went to Moscow, three old men met her, each old man had a sack, and in each sack a cat. How many went to Moscow? (one woman)
18. There are four hollows on four birches, four branches on each hollow, four apples on each branch. How many apples are there? (apples do not grow on a birch)
19. Forty wolves ran, how many necks and tails do they have? (Tails do not grow near the neck)
20. What fabric cannot be used to sew shirts? (From the railway)
21. What three numbers, when added or multiplied, give the same result? (1, 2 and 3)
22. When are hands pronouns? (You-we-you)
23. What woman's name consists of two letters that are repeated twice? (Anna, Alla)
24. In what forests is there no game? (In construction)
25. Which car wheel does not rotate while driving? (Spare)
26. What mathematicians, drummers and even hunters cannot do without? (No fraction)
27. What belongs to you, but others use it more than you? (Name)
28. When does the car move all the time at the speed of the train? (When he is on the platform of a moving train)
29. One egg is boiled for 4 minutes, how many minutes does it take to boil 6 eggs? (4 minutes)
30: Which flower is masculine and feminine? (Ivan da Marya)
31. Name five days without naming the numbers and names of the days. (The day before yesterday, yesterday, today, tomorrow, the day after tomorrow)
32. What bird, having lost one letter, becomes the largest river in Europe? (Oriole)
33. Which city is named after a large bird? (Eagle)
34. What is the name of the first woman in the world who mastered an aircraft? (Baba Yaga)
35. From the name of which city can you make a filling for sweet pies? (Raisin)
36. In what year do people eat more than usual? (In leap year)
37. In what geometric body can water boil? (Cubed).
38. What is the most terrible river? (River Tigris).
39. Which month is the shortest? (May - three letters).
40. Where is the end of the world? (Where the shadow begins).
41. Can an ostrich call itself a bird? (No, because he can't speak).
42. What is under a person's feet when he walks over a bridge? (Shoe sole).
43. What can you easily lift from the ground, but not throw far? (Pooh)
44. How many peas can go into one glass? (Not a single one - everything must be put down).
45. What kind of comb will not comb your head? (Petushin).
46. ​​How can you carry water in a sieve? (Frozen)
47. When is the forest a snack? (When he's cheese)
48. How to pluck a branch so as not to frighten a bird? (Wait for the bird to fly away)
49. What stones are not in the sea? (dry)
50. What freezes in the room in winter, but not on the street? (Window glass)
51. What opera consists of three unions? (Ah, and, yes - Aida)
52. Whoever does not have it does not want to have it, and whoever has it cannot give it away. (bald)
53. What disease on earth has no one been ill with? (Nautical)
54. The son of my father, but not my brother. Who is it? (I myself)
55. What question cannot be answered in the affirmative? (Are you sleeping?)
56. What stands between the window and the door? (Letter "and").
57. What can be cooked but not eaten? (Lessons).
58. How can you put two liters of milk in a one-liter jar? (It is necessary to cook condensed milk from milk).
59. If five cats catch five mice in five minutes, how long does it take for one cat to catch one mouse? (Five minutes).
60. How many months in a year have 28 days? (All months).
61. What do they drop when they need it and pick it up when they don't need it? (Anchor).
62. The dog was tied to a ten-meter rope, and walked three hundred meters. How did she do it? (The rope was not tied to anything).
63. What can travel around the world, staying in the same corner? (Postage Stamp).
64. Is it possible to light a match underwater? (You can, if you pour water into a glass, and keep the match below the glass).
65. How can a thrown egg fly three meters and not break? (You need to throw an egg four meters, then the first three meters it will fly by whole).
66. What will happen to the green cliff if it falls into the Red Sea? (It will get wet).
67. Two people were playing checkers. Each played five games and won five times. Is it possible? (Both people played with other people).
68. What can be bigger than an elephant and weightless at the same time? (Shadow of an elephant).
69. Which hand is better to stir the tea? (Tea is best stirred with a spoon).
70. What question cannot be answered "no"? (You are alive?).
71. What has two arms, two wings, two tails, three heads, three bodies, and eight legs? (Rider holding a chicken).
72. What do all people on earth do at the same time? (Get older).
73. What gets bigger when put upside down. (Number 6).
74. How to jump from a ten-meter ladder and not hurt yourself? (Jump from the bottom step).
75. What has no length, depth, width, height, but can be measured? (Time, temperature).
76. Why does a duck swim? (From the shore)
77. What can be cooked but not eaten? (Lessons)
78. When a car is moving, which wheel does not spin? (Spare)
79. Why does the dog run? (On the ground)
80. What is the tongue in the mouth for? (Behind the teeth)
81. When a horse is bought, what does it look like? (wet)
82. Why does a cow lie down? (Because he can't sit down)
83. When is the easiest time for a black cat to get into the house? (When the door is open)
84. Which month is the shortest? (May - it has only three letters)
85. What is the most terrible river? (River Tigris)
86. Can an ostrich call itself a bird? (No, because he can't speak)
87. What stands between the window and the door? (Letter "and")
88. What will happen to the green ball if it falls into the Yellow Sea? (He gets wet)
89. How many peas can fit into one glass? (Not at all. They can't walk!)
90. What will happen if a black scarf is lowered into the Red Sea? (get wet)
91. Which hand is better to stir tea? (Tea is better to stir with a spoon)
92. What tree does a crow sit on when it rains? (on wet)
93. What dishes can not be eaten? (From empty)
94. What can be seen with closed eyes? (Dream)
95. What do we eat for? (At the table)
96. Why do you go to bed when you want to sleep? (By gender)
97. When are hands pronouns? (When they are you-we-you)
98. How to write "dry grass" in four letters? (hay)
99. 90 apples grew on a birch. A strong wind blew and 10 apples fell. (Apples do not grow on a birch).
100. Under what tree does a hare sit when it rains? (Under wet).
101. Name five days without giving numbers (eg 1, 2, 3, ..) and names of days (eg Monday, Tuesday, Wednesday ...). (The day before yesterday, yesterday, today, tomorrow, the day after tomorrow) .

Addition:
How many eggs can you eat on an empty stomach? (One, the rest are not on an empty stomach.)
What tree does a crow land on when it rains? (To wet.)
How many minutes does it take to boil a hard-boiled egg - two - three - five? (Not at all, it's already cooked. Hard boiled.)
Which clock shows the correct time only twice a day? (Which are standing.)
Where is the water standing? (In glass.)
What happens to a red silk scarf if it is lowered to the bottom of the sea for 5 minutes? (It will be wet.)
What disease on land does no one get sick with? (Nautical.)
When are hands pronouns? (When they are you-we-you.)
What is under a person's feet when he walks across the bridge? (Soles of boots.)
Why do they often go and never go? (On the stairs.)
How far into the forest can a hare run? (Until the middle of the forest, then he already runs out of the forest.)
What happens to a crow after three years? (She is in her 4th year.)
Under which tree does the hare hide when it rains? (Under wet.)
What needs to be done to saw off the branch on which the crow sits without disturbing it? (Wait until she flies away.)
Seven brothers have a sister. How many sisters are there? (One.)
The crow flies, and the dog sits on the tail. Could it be? (Maybe because the dog sits on the ground on its tail.)
If a cat climbs a tree and wants to get down from it along a smooth trunk, how will it go down: head down or tail first? (Tail forward, otherwise it will not hold.)
Who is above us upside down? (Fly.)
What does half an apple look like? (For the second half.)
Is it possible to bring hearths in a sieve? (You can when it freezes.)
Three ostriches flew. The hunter killed one. How many ostriches are left? (Ostriches don't fly.)
What bird is made up of a letter and a river? ("Oriole.)
What lies between the city and the countryside? (Conjunction "and".)
What can you see with your eyes closed? (Dream.)
When is the easiest time for a black cat to get into a house? (When the door is open.)
My father's son, not my brother. Who is it? (I myself.)
Seven candles burned in the room. A man passed by, put out two candles. How much is left? (Two, the rest burned down.)

Good riddles are pleasant to guess and interesting to guess. It develops thinking, logic and broadens one's horizons. The whole family can have an interesting evening with friends if you arrange a quiz.

Interesting riddles with a trick with answers

When a question hides subtext that is not immediately discernible, it becomes doubly difficult. Indulging in reasoning about the question, sometimes they forget about the condition. And here every little thing matters. Otherwise, the answer will be incorrect. According to this principle, the most complex riddles are built with a lot of data and numbers, but the answer lies on the surface, and even a child can give the correct answer.

Interesting riddles with answers:

• You are the pilot of an airplane that flies on the route "Paris - Amsterdam" with two transfers in Berlin. What is the name of the pilot?

/ The condition says that you are flying the plane. So your surname is also yours./

• The lights were turned off throughout the house. But in the closet is gas stove, there is also a kerosene lamp and a candle. There was only one match left in the matchbox. What will you light first?

/First, you should light a match./

• A bus was driving along a country road in a heavy downpour. All passengers fell asleep, only one driver was awake. What was his name and what is the route number?

/ In such a downpour, the numbers are not distinguishable. And the driver is Anatoly./

• An exam is being held at the military school of communications. There is silence in the classroom, only occasionally the teacher taps the table with a pencil. The cadet takes the ticket and sits down at the table. A minute later, he silently approaches with a record book, and the teacher, without asking a single question, gives him "excellent". The happy student leaves. Why?

/ The teacher checked both the knowledge and vigilance of the students. To do this, he, using Morse code, tapped out: “Whoever comes up to me now will get “excellent”. The student was the only one who responded correctly./

Sometimes a riddle is like a small problem: there is a condition, there is a question. For kids, it might be difficult. It is necessary to keep the condition in mind in order to guess. And the scope is still small. But for children of primary school age, interesting puzzles for logic with answers will be useful:

• Which cup is impossible to drink from?

/From empty./

• Under what bushes will a hare hide when it rains?

/ All bushes and trees are wet during the rain. The hare will hide under a wet bush./

• Two absolutely identical people go towards each other. Which of them will greet the other first?

/The one who is more polite./

• The weight of a full barrel of water is 100 kilograms. What should be done so that her weight changes by 10 kilograms?

/ Make a hole in it. /

• What is holding back without touching it with your hands?

/This is your own breath./

• The train moves in the direction of the wind. Where is the smoke directed?

/It does not have smoke, fireboxes in other train designs./

• Polar bears are known to be carnivores. Nevertheless, they eat the seal, but not the penguin. Why?

/They just don't meet, penguins don't live in the North./

• When is the sky lower than the earth?

/When it is reflected in a puddle./

• No matter how huge the pan is, there is something that will never fit in it. What is it?

/ The lid of the pan is always made a little larger than the circumference. /

• It is in the room, but in it is the room itself. What is this?

/Mirror./

Short logic puzzles

This is the name of the tasks in which it is required to draw up a logical sequence of reasoning. She will come up with an answer. Here, too, attentiveness to the condition is the key to the right decision. Here are some interesting logic puzzles with answers:

• A person cannot sleep for seven days. However, he found a way. Which?

/ He decided that he would sleep at night - after all, you can’t do this only during the day. /

• One farmer was returning home from the field. Suddenly a strong wind came up and it started to rain. The farmer had nothing to protect himself, and he came home completely wet. But it turned out that not a single hair on his head got wet! How did he achieve this?

/The farmer was bald./

• One teacher of physics clearly demonstrated the laws of nature. He could briefly set the closed jar on the table in such a way that most of it hung over the floor. True, then the bank still fell. What is the secret of physics?

/ He first froze water in a jar, laying it horizontally. The water was about one third of the jar. When he placed it vertically on the table, the column of ice was always on the table, and the empty part was above the floor. When the ice began to melt, the weight was distributed throughout the bottom and the can fell./

funny riddles

Brainstorming can be tiring. Therefore, we alternate difficult tasks with funny questions. The main thing in them is the smile of the listener. Interesting riddles with answers:

• There is a word that is always mispronounced. What is this word?

/This word is "wrong"./

• He has two horns, but this is not a bull, he has legs, but no hooves, he flies - howls loudly, lands - digs the ground.

And here is a chain of funny riddles that will amuse both children and adults:

• How to put a giraffe in the refrigerator for one-two-three?
  /one. We open. 2. We put a giraffe there. 3. Close./
• How to put an elephant in the refrigerator for one-two-three-four?
  /one. We open. 2. We throw out the giraffe. 3. Pop the elephant. 4. Close./
• Leo ordered everyone to come to the meeting. One didn't come. Who? /This is an elephant, he is sitting in the refrigerator./
• How to cross a river full of crocodiles? /Quickly before the crocodiles return from the meeting./

For adults

Some large commercial corporations use logical tasks when selecting employees. When you need not intelligence, but the ability to accept non-standard solutions. These questions, which will have to be carefully considered, will appeal to parents and older students. There is something to break your head over here. Interesting riddles for adults with answers:

• The prisoner is given a chance of release, provided that he correctly decides his fate. Otherwise, he will face execution. He is placed in front of two doors guarded by two guards. It is known that one always tells the truth, and the other - every other time. The prisoner has the right to ask two questions to only one, but he does not know who is which of the guards. He was able to solve the problem and was released. How did he do it?

/one. Are you a sly one? 2. Is this door to freedom?/

• Mr. Jones called the police and said that Mr. Wills was threatening to kill him. He insisted that someone be sent to him immediately. A detective arrived at the scene and found Jones' body. Turning on Jones' recorder, he heard: "Wills is going to kill me. He's already here. Hiding is useless. This recording will be grounds for his arrest." The detective realized that this was a false trail. The real culprit was discovered later. Why wasn't Wills arrested?

/ A rewound dictaphone tape spoke of fabricated evidence against Wills. If he saw Jones say something into the recorder, he would have destroyed the tape./

For kids

• Why are you going to sleep on the bed?

/By gender./

• What happens to a red handkerchief if you put it in a river?

/Wet./

• Write the word "mousetrap" using five letters.

• That a sheep has one, a sparrow has two, and a mouse has none?

/The letter "o"./

• Name the canvas from which nothing can be sewn.

/Railway./

• Name the forests where no one lives.

/Construction./

• Name a car wheel that does not rotate while driving.

/Spare./

• Name five days in a row without naming numbers.

/ The day after tomorrow, tomorrow, today, yesterday, the day before yesterday. /

• Name the first female pilot.

/Baba Yaga./

• Which comb is not suitable for hairstyles?

/Rooster./

• How is water carried in a sieve?

/In the form of ice./

For the whole family

Stories about Sherlock Holmes are read with interest by both adults and children. I immediately want to apply his deductive method, and then tell my best friend: “Elementary, Watson!” And if there were cell phones in his time, it would be quite simple. For you - interesting riddles with answers, where the famous detective appears.

• Once, while walking around London, Sherlock Holmes noticed a woman lying on the ground. Unfortunately, she was dead. Holmes took a phone out of her purse and found her husband's number there. Calling him, he said: “Your wife is dead. Come quickly." When he arrived, the police were already waiting for him. Holmes pointed to him as a criminal. Why?

/Holmes did not name the street where he found the body./

And here is a problem about the inhabitants of a remote Russian outback:

• An orphan girl lived on a farm. She had 3 cats, 3 dogs, 3 parrots and 2 hamsters. Hamsters had babies, 7 pieces. I needed to buy food for these animals. The road to the store went first through a field, then through a forest, then again through a field, then again through a forest, then again through a field. But it turned out that the food was not delivered. She had to go to another store: field, forest, field, forest, field, forest. It was an unfamiliar forest, and the girl fell into a well-camouflaged hole. Then she heard that she was given a condition: if she gets out of the hole, her mother will die. If she stays in the hole, her dad will die. How should she be?

/Get out of the pit, because everyone died long ago./

After reviewing all these interesting riddles with answers, you can deduce the principles by which they are composed and try to please your loved ones with new options about Sherlock Holmes or intricate puzzles in which the main thing is to remember the condition well.

With a catch that gained popularity among a huge number different people not only because of the opportunity to use them in the educational process, but also because of the entertainment component.

Such riddles contribute to the expansion of the horizons of both children and adults, and they are of interest to those who want to replenish their knowledge. They are light and simple. Let's start.

1. A man stands on one side of the river, his dog on the other. He calls the dog, and he immediately runs to the owner, without getting wet, without using either the boat or the bridge. How did she do it?

2. What is unusual about the number - 8, 549, 176, 320?

3. A 12 round bout is scheduled between two boxers. After 6 rounds, one boxer is knocked to the floor, but none of the men is considered a loser. How is this possible?

4. In 1990, a person turned 15 years old, in 1995 the same person turned 10. How is this possible?

5. You are standing in the corridor. Before you are three doors to three rooms and three switches. You do not see what is happening in the rooms, and you can only get into them through the door. You can enter each room once and only when all the switches are off. How to understand which switch belongs to which room?

6. Johnny's mother had three children. The first child was named April, the second was named May. What was the name of the third child?

7. Before the discovery of Mount Everest, what was the highest peak in the world?

8. What word is always misspelled?

9. Billy was born on December 25, but his birthday always falls in the summer. How is this possible?

10. A truck driver is moving in the opposite direction on a one-way street. Why aren't the cops stopping him?

11. How can you throw a raw egg on a concrete floor without breaking it?

12. How can a person go eight days without sleep?

13. The doctor gave you three tablets and told you to take one every half an hour. How long will it take you to take all the pills?

14. You entered a dark room with one match. The room has an oil lamp, a newspaper and wooden blocks. What will you light first?

15. Is a man legally entitled to marry his widow's sister?

16. Some months have 30 days, some have 31 days. How many months have 28 days?

17. What goes up and down but stays in one place?

18. What can you never eat for breakfast?

19. What always increases and never decreases?

20. Imagine that you are in a sinking boat surrounded by sharks. How can you survive?

21. How many times can you subtract 10 from 100?

22. Seven sisters arrived at the dacha, and each of them went about her own business. The first sister cooks food, the second one works in the garden, the third one plays chess, the fourth one reads a book, the fifth one does a crossword puzzle, the sixth one does laundry. And what does the seventh sister do?

23. What goes both uphill and downhill, but at the same time remains in place?

24. Which table has no legs?

Difficult riddles with answers

25. How many years are there in a year?

26. What kind of cork can not stop up any bottle?

27. No one eats it raw, but when cooked, they throw it away. What is it?

28. The girl wanted to buy a chocolate bar, but she lacked 10 rubles. The boy also wanted to buy a chocolate bar, but he lacked 1 ruble. The children decided to buy one chocolate bar for two, but they still lacked 1 ruble. How much does a chocolate bar cost?

29. A cowboy, a yogi and a gentleman are sitting at the table. How many feet are on the floor?

30. Nero, George Washington, Napoleon, Sherlock Holmes, William Shakespeare, Ludwig van Beethoven, Leonardo da Vinci. Who is missing from this list?

Riddles with a trick

31. Which island calls itself a piece of linen?

32. Is she red?

No, black.

Why is she white?

Because green.

33. You are sitting in an airplane, a car is in front of you, a horse is behind you. Where are you?

34. How long does it take to boil a hard boiled egg in water?

35. What unites the numbers 69 and 88?

Logic riddles

36. Whom does God never see, the king rarely sees, but the common man sees every day?

37. Who walks while sitting?

38. What is the longest month of the year?

39. How can you jump off a 10-meter ladder and not crash? And not even get hurt?

40. When this item is needed, it is abandoned, and when it is not needed, it is taken with them. What are we talking about?

Riddles with answers

41. Any person receives it for free twice in his life, but if he needs it a third time, then he will have to pay for it. What is it?

42. The name of which state will you get if you put a small horse between two identical pronouns?

43. The capital of a European state in which blood flows?

44. The combined age of father and son is 77 years. The age of the son is the age of the father in reverse. How old are they?

45. If it is white, then it is dirty, and if it is black, then it has been cleansed. What are we talking about?

Difficult riddles

46. ​​Can a person be in a room without his head and still be alive?

47. In what case will you not be able to take the place of a seated person, even if he gets up?

48. What product can be boiled in at least 10 kg of salt, and it still will not become salty?

49. Who can easily light a match underwater?

50. A plant that knows everything?

51. What will you do if you see a green man?

52. How many stripes does a zebra have?

53. When does a person look like a tree?

54. What can travel around the world, staying in the same corner?

55. Where is the end of the world?

Ready for answers?

Answers to riddles

1. The river is frozen

2. This number contains all digits from 0 to 9.

3. Both boxers are female.

4. He was born in 2005 BC.

5. Turn on the right switch and do not turn it off for three minutes. After two minutes, turn on the middle switch and keep it on for one minute. When the minute has passed, turn off both switches and enter the rooms. One bulb will be hot (switch 1), one will be warm (switch 2), and the cold bulb will refer to the switch you didn't touch.

6. Johnny.

7. Everest, it just hasn't been discovered yet.

8. The word "wrong."

9. Billy was born in the southern hemisphere.

10. He is walking along the sidewalk.

11. An egg won't break a concrete floor!

12. Sleep at night.

13. You will need one hour. Take one tablet now, the second in half an hour, and the third in another half hour.

14. Match.

15. No, he is dead.

16. Each month has 28 or more days.

17. Staircase.

19. Age.

20. Stop imagining.

22. The seventh sister plays chess with the third.

23. Road.

24. At the diet.

25. There is one summer in a year.

26. Traffic jam.

27. Bay leaf.

28. The price of a chocolate bar is 10 rubles. The girl had no money at all.

29. One foot on the floor. The cowboy puts his feet on the table, the gentleman crosses his legs, and the yogi meditates.

30. Sherlock Holmes because he is a fictional character.

32. Blackcurrant.

33. Carousel.

34. This does not need to be done, the egg is already boiled.

35. Upside down, they look the same.

36. Like yourself.

37. Chess player.

39. Jump off the lowest step.

42. Japan.

44.07 and 70; 25 and 52; 16 and 61.

45. School board.

46. ​​Yes. Stick your head out the window or door.

47. When sitting on your lap.

49. Sailor on a submarine.

51. Cross the road.

52. Two, black and white.

53. When he had just woken up (pine, from sleep).

55. Where the shadow begins.

No matter how many correct answers you get, this is not an IQ test. It is important to force your brain to think outside of the ordinary. Below we will give you some tips that will help tune your brain to the right wave and prevent it from aging.

brain exercises

Let a crossword, puzzle, sudoku, or any other similar thing that interests you always be in a conspicuous place. Every morning spend a few minutes on them, activate the brain.

Constantly attend exhibitions or conferences on topics unfamiliar to you. Think about how you can apply what you've learned to your industry.

Preschoolers solve this problem in 5-10 minutes. For some programmers, it takes up to an hour to complete it. But many people, after writing a few sheets of paper, give up.

Parking space number

A six-year-old child usually takes no more than 20 seconds to solve this problem. But unprepared adults, she often enters into a stupor. So what number is hidden under the car?

A riddle for a genius

A genius finds a solution in 10 seconds. Bill Gates - in 20 seconds. Graduate of Harvard (Harvard University) - in 40 seconds. If you found the answer in 2 minutes, then you belong to the top 15% of the most gifted people. 75% of people are not able to solve this problem.

Ruler of the island

The autocratic ruler of one island wanted to prevent aliens from settling on the island. Wanting to keep the appearance of justice, he issued an order according to which anyone who wants to settle on the island should, after thinking well, make any statement, and after a preliminary warning that his life depends on the content of this statement. The order read: “If the stranger tells the truth, he will be shot. If he tells a lie, he will be hanged." Can an alien become a resident of the island?

Project approval

According to the agreement, the procedure for approving a new project, in the development of which institutions A, B, C participate, is as follows: if A and B participate in the approval first, then institution C must also join the participation. If approval occurs first in institutions B and C, Institution A also joins. The question is: are such cases possible when approving a project, when only institutions A and C would take part in it, while the participation of institution B would not be necessary (while maintaining an agreement on the procedure for approving projects)?

Two tribes

Two tribes live on the island: well done. Who always tell the truth, and liars who always lie. The traveler met an islander, asked him who he was, and when he heard that he was from a tribe of fellows, he hired him as a guide. They went and saw another islander in the distance, and the traveler sent his guide to ask him what tribe he belonged to. The guide returned and said that he claims to be from a tribe of fellows. The question is: was the conductor a good fellow or a liar?

Aborigines and aliens

Before the court are three people, of which each can be either an aborigine or an alien. The judge knows that natives always answer questions truthfully, and aliens always lie. However, the judge does not know which of them is an aborigine and which is an alien. He asks the first one, but does not understand his answer. Therefore, he asks first the second, and then the third about what the first answered. The second says that the first said that he was an aborigine. The third says that the first called himself an alien. Who were the second and third defendants?

beetle on tape

The beetle went on a journey. He crawls along the tape, the length of which is 90 centimeters. At the other end of the ribbon, two centimeters from the end, is a flower. How many centimeters will the beetle have to crawl to the flower: 88 or 92 (provided that it crawls all the time on one side and only at the end can it cross over to the other side through the end of the tape)?

Purchase

Marina took a long time choosing which jug to buy. Finally chose. The saleswoman put the purchase in a box. What did Marina buy? How many jugs did the saleswoman put on the shelves on which they stood before?

Tourist

The tourist walked to the lake. He came to a crossroads, from where one road led to the right and the other to the left; one went to the lake, the other did not. Two guys were sitting at the crossroads, one of them always told the truth, the second always lied. Both of them answered any question with either "yes" or "no". All this was known to the tourist, but he did not know which of them was telling the truth and which was lying; he also did not know which road led to the lake. The tourist put only one question to one of the guys. What was the question, since he knew from the answer which road leads to the lake?

broken window

There were nine students left in the class during the break. One of them broke the window. The teacher's question was answered as follows:

How many triangles? What team?

Read carefully and do not write anything down: Torpedo tops the standings, Spartak is in fifth place, and Dynamo is right in the middle between them. If Lokomotiv is ahead of Spartak, and Zenit takes place immediately behind Dynamo, then which of the listed teams is in second place? You have 30 seconds to think.

Project approval procedure

The enterprise has three workshops - A, B, C, agreed on the procedure for approving projects, namely: 1. If workshop B does not participate in the approval of the project, then workshop A does not participate in this approval. 2. If workshop B participates in approval of the project, then shops A and C take part in it. The question is: under these conditions, is shop C obliged to take part in the approval of the project, when shop A participates in the approval?

An evening walk

Which of these nine mustaches went on an "evening walk"?

7 buttons

Which of the 7 buttons should be pressed. For the bell to ring? It is recommended to find the path mentally.

Make a table

In the Moscow semi-finals of the European Basketball Championship, held in Soviet time, the places were distributed as follows: the USSR - 14 points, Italy and Czechoslovakia - 12 points each, Israel - 11, Finland - 10, East Germany and Romania - 9 points each and Hungary - 7 points. According to the position. Each team received 2 points for a win, 1 point for a loss, and 0 points for a no-show. Draws were not allowed. Make a summary table of the results of the games if it is known that the Finnish team won against the Italian team and lost to the Romanian team.

Explanation is inevitable

On Tuesday, at about 10 am, a stranger burst into Inspector Warnicke's room. He was extremely excited. His hands were trembling, his tousled hair stuck out in all directions. A few minutes later, after lighting a cigarette and calming down, the visitor began his story: - This morning I returned from vacation. All night I had to shake on the train. I didn't get enough sleep and when I got home I decided to lie down on the sofa. From fatigue, I did not immediately notice that the piano had disappeared from the room, but coffee table and the chair moved. On this sheet of paper, I drew a plan for the arrangement of the furniture in the room before I left. - Here's what, dear, - said Inspector Varnicke, glancing briefly at the drawing, - First of all, it's quite clear to me that you didn't have a piano at all. Now let's find out why you needed this lie. Why did Inspector Varnicke doubt the veracity of the visitor's story?

LOGIC TASKS

Logic tasks, as well as mathematics, is called "mind gymnastics". But unlike mathematics, logic tasks- this is an entertaining gymnastics, which in a fun way allows you to test and train thought processes, sometimes in an unexpected perspective. To solve them, you need quick wit, sometimes intuition, but not special knowledge. Solving logic problems is to thoroughly analyze the condition of the problem, to unravel the tangle of contradictory connections between characters or objects. Logic tasks for children- these are, as a rule, whole stories with popular characters, in which you just need to get used to, feel the situation, visualize it and catch the connections.

Even the most difficult logic puzzles do not contain numbers, vectors, functions. But the mathematical way of thinking is necessary here: the main thing is to comprehend and understand the condition logical task. The most obvious decision on the surface is not always the right one. But more often than not, solving a logic problem turns out to be much simpler than it seems at first glance, despite the confusing condition.

Interesting logic tasks for children in a variety of subjects - mathematics, physics, biology - arouse their increased interest in these academic disciplines and help in their meaningful study. Logic tasks for weighing, pouring, tasks for non-standard logical thinking will help in Everyday life solve everyday problems in a non-standard way.

In the process of decision logic tasks you will get acquainted with mathematical logic - a separate science, otherwise called "mathematics without formulas." Logic as a science was created by Aristotle, who was not a mathematician, but a philosopher. And logic was originally part of philosophy, one of the methods of reasoning. In the work "Analytics" Aristotle created 20 schemes of reasoning, which he called syllogisms. One of his most famous syllogisms is: “Socrates is a man; all men are mortal; So Socrates is mortal. Logic (from other Greek. Λογική - speech, reasoning, thought) is the science of correct thinking, or, in other words, "the art of reasoning".

There are certain methods solving logic problems:

way of reasoning, with the help of which the simplest logical problems are solved. This method is considered the most trivial. In the course of the solution, reasoning is used that consistently takes into account all the conditions of the problem, which gradually lead to a conclusion and the correct answer.

tables way, used in solving text logic problems. As the name implies, solving logical problems consists in building tables that allow you to visualize the condition of the problem, control the process of reasoning, and help draw the right logical conclusions.

graphs way consists in enumeration options development of events and the final choice of the only right decision.

flowchart method- a method widely used in programming and solving logical transfusion problems. It consists in the fact that, first, operations (commands) are allocated in the form of blocks, then the sequence of execution of these commands is established. This is the block diagram, which is essentially a program, the execution of which leads to the solution of the task.

billiard way follows from the theory of trajectories (one of the sections of probability theory). To solve the problem, it is necessary to draw a billiard table and interpret the actions of the movements of the billiard ball along different trajectories. It is necessary to keep records possible outcomes in a separate table.

Each of these methods is applicable to solving logical problems from different areas. These seemingly complex and scientific techniques can be used in solving logic problems for grades 1, 2, 3, 4, 5, 6, 7, 8, 9.

We present you with a variety of logical tasks for grades 1, 2, 3, 4, 5, 6, 7, 8, 9. We have selected for you the most interesting logic puzzles with answers which will be interesting not only for children, but also for parents.

• choose for the child logic tasks according to his age and development
• do not rush to open the answer, let the child find it himself logical solution tasks. Let him come to the right decision himself and you will see what pleasure and a sense of delight he will have when his answer coincides with the given one.
• during solving logic problems Leading questions and indirect clues indicating the direction of reflection are acceptable.

With our selection logical tasks with answers you will really learn how to solve logical problems, expand your horizons and significantly develop logical thinking. Dare!!!

Logic problem solving — the first step in child development.

E.Davydova

Logic is the art of coming to an unpredictable conclusion.

Samuel Johnson

Without logic, it is almost impossible to bring into our world ingenious finds of intuition.

Kirill Fandeev

A person who thinks logically stands out nicely against the background of the real world.

American saying

Logic is the morality of thought and speech.

Jan Lukasiewicz

Riddles with a trick - riddles with a simple question and a non-standard answer. At first glance, the answer may seem strange and wrong, but if you carefully read the riddle and think about the answer, it will turn out to be quite logical. Trick riddles are usually not without a sense of humor. They not only develop ingenuity and out-of-the-box thinking, but also bring fun. Tell riddles with a trick to your friends and relatives, have a fun and useful time.

The same person always came to the football match. Before the start of the game, he guessed the score. How did he do it?
Answer: Before the start of the game, the score is always 0:0
87238

More than an hour, less than a minute.
Answer: Second (hand of some watch models)
Tag. Anna
50085

What language is spoken silently?
Answer: sign language
143202

Why is the stopcock red on trains and blue on planes?
Answer: Many will say, "I don't know." Experienced will answer: "There is no stop valve on airplanes." In fact, the plane has a stopcock in the cockpit.
Makarova Valentina, Moscow
33395

The boy paid 11 rubles for a bottle with a cork. A bottle costs 10 rubles more than a cork. How much does a cork cost?
Answer: 50 cents
Orlov Maxim, Moscow
41937

One French writer terribly disliked the Eiffel Tower, but he constantly dined there (on the first level of the tower). How did he explain it?
Answer: This is the only place in all the vast Paris, from where it is not visible.
Borovitsky Vyacheslav, Kaliningrad
39425

What city are you hiding in? man's name and side of the world?
Answer: Vladivostok
Mezhuleva Julia
45647

Seven sisters are in the country, where each is busy with some business. The first sister is reading a book, the second is cooking, the third is playing chess, the fourth is doing Sudoku, the fifth is doing the laundry, the sixth is looking after the plants. And what does the seventh sister do?
Answer: plays chess
Gobozov Alexey, Sochi
45188

Why do they go often, but rarely go?
Answer: stairs
182155

It goes uphill, then downhill, but remains in place.
Answer: Road
141713

Which word has 5 "e" and no other vowels?
Answer: immigrant
Radaev Evgeny, Petrozavodsk
41682

Two people approach the river. Near the shore is a boat that can only support one. Both men crossed to the opposite bank. How?
Answer: They were on different shores
25 25, Vladivostok
31173

Vasily, Peter, Semyon and their wives Natalya, Irina, Anna have been together for 151 years. Every husband is 5 years older than his wife. Vasily is 1 year older than Irina. Natalya and Vasily together are 48 years old, Semyon and Natalya are together 52 years old. Who is married to whom, and how old is who? (Age must be expressed in whole numbers).
Answer: Vasily (26) - Anna (21); Peter (27) - Natalia (22); Semyon (30) - Irina (25).
Chelyadinskaya Victoria, Minsk
19196

Jackdaws flew, sat on sticks. They sit down one by one - the jackdaw is superfluous, they sit two by two - the stick is superfluous. How many sticks were there and how many jackdaws were there?
Answer: Three sticks and four jackdaws
Baranovsky Sergey, Polotsk
26140

Where is it found that a horse jumps over a horse?
Answer: Chess
)))))))) Renesmee, L.A
36559

Which table has no legs?
Answer: Diet
Boyko Sasha, Wolf
30928

Do not write anything or use a calculator. Take 1000. Add 40. Add another thousand. Add 30. Another 1000. Plus 20. Plus 1000. And plus 10. What happened?
Answer: 5000? Wrong. The correct answer is 4100. Try to recalculate on a calculator.
Ivanova Daria, Daria
34123

How can a person not sleep for 8 days?
Answer: sleep at night
Sone4ka0071, Sosnogorsk
34861

What animal do people walk on and cars pass by?
Answer: Zebra
Kostryukova Tanya, Saransk
27192

Which word "no" is used 100 times?
Answer: Groan
Muslimova Sabina, Dagestan (Derbent)
32348

What is an elephant without a nose?
Answer: Chess
Prokopyeva Xenia, Moscow
28138

Mr. Mark was found murdered in his office. The cause was a bullet wound to the head. Detective Robin, inspecting the scene of the murder, found a cassette recorder on the table. And when he turned it on, he heard the voice of Mr. Mark. He said, “This is Mark. Jones just called me and said that in ten minutes he would be here to shoot me. It's useless to run. I know this tape will help the police arrest Jones. I hear his footsteps on the stairs. Here the door opens... The assistant detective offered to arrest Jones on suspicion of murder. But the detective did not follow his assistant's advice. As it turned out, he was right. Jones wasn't the killer, as was said on the tape. Question: why did the detective have suspicions?
Answer: The cassette in the voice recorder was being revised at the start. Moreover, Jones would have taken the cassette.
Katarina, Moscow
11148

Sherlock Holmes was walking down the street. And suddenly he saw a dead woman lying on the ground. He walked over, opened her bag and took out her phone. In tel. book, he found her husband's number. He called. He speaks:
- Urgently come here. Your wife is dead. And after a while the husband arrives. He looks at his wife and says:
- Oh, honey, what happened to you?
And then the police arrive. Sherlock points his finger at the woman's husband and says:
- Arrest this man. It was he who killed her. Q: Why did Sherlock think that?
Answer: Because Sherlock didn't tell her husband the address.
Tusupova Aruzhan
19325

Two fifth-graders Petya and Alyonka are walking from school and talking.
“When the day after tomorrow becomes yesterday,” one of them said, “today will be as far from Sunday as the day that was today when the day before yesterday was tomorrow.” What day of the week did they speak?
Answer: Sunday
Piggy, Ololoshkino
14365

There is a rich house and a poor one. They are on fire. Which house will the police put out?
Answer: Police don't put out fires, firefighters put out fires
80960

On what path has no one ever walked or traveled?
Answer: Milky Way
Tikhonova Inessa, Aktobe
23896

How many years in a year?
Answer: one (summer)
Maxim, Penza
29269

What kind of cork can not plug a single bottle?
Answer: road
Volchenkova Nastya, Moscow
24370

In what word is the drink and the natural phenomenon “hidden”?
Answer: grapes
anufrienko dasha, khabarovsk
23880

What sign must be placed between 6 and 7 so that the result is less than 7 and greater than 6?
Answer: comma
Mironova Violetta, Saratov
21011

Without which nothing ever happens?
Answer: Untitled
Anyutka, Omsk
24666

Union, number then preposition -
That's the whole charade.
And so that you can find the answer,
We need to remember the rivers.
Answer: i-hundred-k
nazgulichka, ufa
17127

What is the strongest muscle in the human body?
Answer: The common opinion is the language. In fact, the calf and chewing muscles.
Anonymous
18753

You can tie, but you can't untie.
Answer: conversation
Dasha, Chelyabinsk
22865

To what mere mortal even the president takes off his hat?
Answer: hairdresser
Nastya Slesarchuk, Moscow
21552

How to put 2 liters of milk in a liter jar?
Answer: Turn it into curd
Anonymous
18772

Once upon a time there was one orphan girl in the thicket, she had only two kittens, two puppies, three parrots, a turtle and a hamster with a hamster that was supposed to give birth to 7 hamsters. The girl went for food. She goes through the forest, field, forest, field, field, forest, forest, field. She came to the store, but there was no food there. Goes on, forest, forest, field, field, forest, field, forest, field, forest, field, field, forest. And the girl fell into the hole. If she gets out, dad will die. If she stays there, her mother will die. The tunnel cannot be dug. What should she do?
Answer: She is an orphan
I'm Yulechka, Omsk
14608

They are metallic and liquid. What are we talking about?
Answer: nails
babicheva alena, moscow
15521

How to write "duck" in 2 cells?
Answer: In the 1st - the letter "y", in the 2nd - a dot.
Sigunova 10 years old Valeria, Zheleznogorsk
21347

Name a word in which one letter is a prefix, the second is a root, the third is a suffix, the fourth is an ending.
Answer: Gone: y (prefix), sh (root), l (suffix), a (ending).
Malec Daniel
14983

Guess the riddle: who has a heel behind his nose?
Answer: Shoes
lina, Donetsk
18141

There were 20 people on the bus. At the first stop, 2 people got off and 3 people got in, at the next one, 1 got off and 4 got in, at the next, 5 got off and 2 got in, at the next, 2 got off and 1 got in, at the next, 9 got off and no one got in, at the next - 2 more came out. Q: How many stops were there?
Answer: The answer to the riddle is not that important. This is a riddle with an unexpected question. While you are telling the riddle, the guesser begins to mentally count the number of people on the bus, and at the end of the riddle, you will confuse him with a question about the number of stops.
41035

Husband and wife lived. The husband had his own room in the house, which he forbade his wife to enter. The key to the room was in the bedroom dresser. So they lived for 10 years. And so the husband went on a business trip, and the wife decided to go into this room. She took the key, opened the room, turned on the light. The wife walked around the room, then saw a book on the table. She opened it and heard someone open the door. She closed the book, turned off the light and closed the room, putting the key in the chest of drawers. This is the husband. He took the key, opened the room, did something in it and asked his wife: “Why did you go there?”
How did the husband guess?
Answer: The husband touched the light bulb, it was hot.
SLEPTSOVA VIKUSIA, OMSK
12348

There were husband and wife, brother and sister, and husband and brother-in-law. How many people?
Answer: 3 people
Arkharov Mikhail, Orekhovo-Zuevo
15391

The full name is Danuta. How does it sound abbreviated?
Answer: Dana
Khanukova Danuta, Bryansk
13391

A river that "fits" in your mouth?
Answer: Gum
Bezusova Anastasia, Overyata village