The most difficult riddle in the world. The most difficult logic puzzles

Tricky logic puzzles are highly valued in large companies, they can intrigue the team, enliven the atmosphere and simply cheer up. Top most difficult logic puzzles with a catch:

The farmer had a flock of eight sheep: three white, four black and one brown.

How many sheep can say that there is at least one other sheep of the same color as hers in this small flock? (answer: not a single sheep, since sheep cannot talk).

Six brothers are resting in a country house, where each of them is doing something.

The first brother leafs through a magazine, the second warms up dinner, the third plays checkers, the fourth solves a crossword puzzle, the fifth cleans the yard. What is the sixth brother doing? (answer: the sixth brother is playing checkers with the third).

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One day Sherlock Holmes was walking and found a dead girl. He approached her, took a phone out of her purse, found her husband's number, called and said: "Sir, come here quickly, your wife is dead!" A little time passed, the husband came, ran to the body of his wife and began to cry: “Oh, dear, who did this?”

The police arrived, Sherlock, pointing to the husband of the deceased, said: "Arrest him, he is to blame for her death." Why was Sherlock Holmes so sure of his conclusion? (answer: because he did not specify the place when he called his husband).

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What sign to put between the numbers 8 and 9so that the answer is less than 9, but more than 8? (answer: you need to put a comma).

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40 people rode in the train car, at the first stop 13 got off, 3 people got in, at the next 10 got off and 15 got in, then 5 left the train and 11 got in, at the other stop 14 got off, then 7 people got in and 1 left the car.

How many stops did the train make? (The answer to the riddle is not important, in the process the person who is given the logical task begins to count the number of people who got off and on at the stops, but does not pay attention to how many stops the train made, this is the catch of this riddle.)

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Katya really wanted to buy chocolate, but in order to buy it, she had to add 11 kopecks. And Dima wanted chocolate, but he lacked 2 kopecks. They decided to buy at least one chocolate bar, but they still lacked 2 kopecks. How much does chocolate cost? (answer: a chocolate bar costs 11 kopecks, Katya has no money at all).

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The baron has it, but the emperor does not, Bogdan has it in front, and Zurab has it behind, the grandmother has two, and the girl has none. What is this about? (answer: about the letter "B").

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In a frosty winter, the snake Gorynych stole the beautiful Vasilisa. Ivan Tsarevich went to Baba Yaga to find out where Gorynych lives, and Baba Yaga said to him: “You, Ivan, go through the mountains, through the forests, through the forests - through the mountains, through the mountains - through the forests, through the forests forests - over the mountains - over the mountains, there you will find Gorynych's house.

And Ivan Tsarevich galloped on his horse over the mountains - through the forests - through the forests - over the mountains - over the mountains - through the forests - through the forests - through the forests - over the mountains - over the mountains and sees: in front of him is a wide river, and behind it is the house of the Serpent . How to cross the river, because there is no bridge? (answer: on ice. Everything happened in a frosty winter).

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The physical education teacher has a brother, Arseniy. But Arseny has no brothers, is it possible? (answer: yes, if the physical education teacher is a woman).

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A prisoner was kept in an empty cell. He sat alone, every day they brought him dry bread, how did the bones appear in the cell? (answer: bones from fish, bread was brought with an ear).

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Two mothers and two daughters were sitting in the room, there were only three pears on the table, but each ate a pear. Is it possible? (answer: yes, there were grandmother, daughter and granddaughter in the room).

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One boy was walking in the park and saw a high school student. The senior student offered to argue: “If I write your exact height in a notebook, then you will give me 1000 rubles, and if I make a mistake, then I will give you. I promise I won't ask you any questions, and I won't measure you either." The boy agreed.

The high school student wrote something in a notebook, showed it to the boy, the boy looked and gave the high school student 1,000 rubles. How did the high school student manage to win the argument? (answer: a high school student wrote “your exact height” in a notebook).

ARITHMETIC AND LOGIC PUZZLES

Grandma Dasha has a grandson Pasha, a cat Fluff, a dog Druzhok. How many grandchildren does the grandmother have?

The thermometer shows plus 15 degrees. How many degrees will two such thermometers show?

Sasha spends 10 minutes on the way to school. How much time will he spend if he goes with a friend?

My father's child, not my brother. Who is it?

There are 8 benches in the park. Three have been painted. How many benches are there in the park?

My name is Yura. My sister has only one brother. What is the name of my sister's brother?

The banana was cut into three pieces. How many incisions were made?

What is lighter than 1 kg of cotton wool or 1 kg of iron?

(Same)

The truck was going to the village. On the way he met 4 cars. How many cars were going to the village?

Two boys played checkers for 2 hours. How long did each boy play

(Two hours)

The miller went to the mill and saw 3 cats in each corner. How many legs are on the mill?

The famous magician says he can put the bottle in the center of the room and crawl into it. Like this?

(Everyone can crawl into the room)

One driver did not take his driver's license with him. There was a one-way sign, but he moved in the opposite direction. The policeman saw this but did not stop him. Why?

(The driver was walking)

Can it rain for two days in a row?

(No, between them is the night)

What will happen to the crow when it turns 7 years old?

(The eighth will go)

You can jump into it on the move, but you cannot jump out of it on the move. What's this?

(Airplane)

Born twice, dies once. Who is it?

(Chick)

What can't you pick up from the floor by the tail?

(ball of thread)

Who walks sitting?

(chess player)

What always increases and never decreases?

(Age)

A saucepan was placed on the edge of the table, tightly closed with a lid, so that two-thirds of the saucepan hung from the table. After a while, the pan fell off. What was in it?

The more you take from it, the more it becomes... What is it?

The girl fell from the second floor and broke her leg. How many legs will a girl break if she falls from the fourth floor?

(Maximum one, since the second leg is already broken)

The boy walks home from school for 30 minutes. In how many minutes will 3 boys walk the same road?

(In 30 minutes)

Where was Moses when the candle went out?

(In the dark)

The 9-storey building has an elevator. 2 people live on the first floor, 4 people live on the second floor, 8 people live on the third floor, 16 people live on the fourth floor, 32 people live on the fifth floor, etc. Which button in the elevator of this house is pressed more often than others?

(First floor button)

When is the best time for a black cat to sneak into a house?

(When the door is open)

A soldier walked past the Eiffel Tower. He took out a gun and fired. Where did he get to?

(to the police)

When a house is built, what is the first nail driven into?

(In a hat)

What goes uphill, then downhill, but remains in place?

What does half an orange most closely resemble?

(For the second half of the orange)

Two went - three milk mushrooms found. Four follow, how many milk mushrooms will they find?

(No one)

There are 25 coconuts in a box. The monkey stole all but 17 nuts. How many nuts are left in the box?

(17 nuts left)

Guests have come to you, and in the refrigerator there is a bottle of lemonade, a bag of pineapple juice and a bottle of mineral water. What will you open first?

(Fridge)

What kind of comb can not be combed?

(Petushin)

Which month has 28 days?

(Every month eats on the 28th)

What is not eaten raw, but cooked - thrown away?

(Bay leaf)

Which month is the shortest?

(May - it has only three letters)

What will happen to the red ball if it falls into the Black Sea?

(He gets wet)

Which hand is best for stirring tea?

(It is better to stir with a spoon)

What question cannot be answered with "yes"?

("Are you sleeping?")

What question can't be answered with "no"?

("You are alive?")

Which nose does not smell?

(The nose of a shoe or boot, the spout of a teapot)

How many eggs can you eat on an empty stomach?

(One thing. Everything else will not be eaten on an empty stomach)

It's given to you, and people use it. What's this?

Can an ostrich call itself a bird?

(No, because he can't speak)

The man was in a car. He did not turn on the headlights, there was no moon either, the street lamps did not shine along the road. An old woman began to cross the road in front of the car, but the driver braked in time, and the accident did not happen. How did he manage to see the old woman?

(There was a day)

Which ear does not hear?

(Ear (ear) at the mug)

What can you see with your eyes closed?

How long can you go to the forest?

My father's son, not my brother. Who is it? Where is the water standing? What is only visible at night?

(Myself) (In the well) (Stars)

A flock of ducks flew: two in front, two behind, one in the middle and three in a row. How many are there?

A son and father and a grandfather and grandson walked in a column. How many?

There was a husband and wife, brother and sister, and brother-in-law and son-in-law. Is there a lot of everyone?

A flock of birds flew, sat two by two on a tree - one tree remained; sat down one at a time - one was missing. How many birds and how many trees?

(Three trees and four birds)

Why did the merchant buy the hat?

(For money)

Which road do they drive for six months and walk for six months?

Logical riddles and tasks are the necessary material for a teacher to conduct extracurricular activities (matinees, KVN, games), which contribute to the formation of students' computational skills and logical thinking. The material is recommended for children in grades 3-4.

What can travel around the world, staying in one place, in one and the same corner? (Postage Stamp)

What belongs to you, but others use it? (Your name)

What animal do people walk on and cars pass by? (Across the zebra)

One brick weighs 1 kg and half a brick. How much does a brick weigh? (2 kg)

How to turn a drop into a heron? Answer (Replace the letter "k" with "c".)

It cannot be eaten, but it can be cooked. (Lesson)

What can't mathematicians, drummers and hunters do without? (No fraction)

It goes uphill, downhill, but remains in place. (Road)

What fabric can not be used to sew a shirt? (From the railway)

How can you transfer water in a sieve? (It is necessary to put a piece of ice in a sieve)

What it is? The more you take from it, the more it becomes. (Pit)

What elephant doesn't have a trunk? (At the chess)

A train travels east at a speed of 80 km/h. In which direction is the smoke flying? (Electric trains do not smoke (unless there is a fire).)

What not to pick up from the ground? (Shadow)

From which tap you can’t wash your hands (From construction)

A barrel of water weighs 50 kg, what needs to be added to make it weigh 15 kg. (Hole)

What is heavier than one kilogram of iron or cotton wool? (Same)

You can tie, but you can not untie (Conversation)

How many pens will go into the pencil case? (None, because the hands can't walk)

What kind of water can cut your hand? (Ice)

Which month has 28 days? (Every month eats on the 28th)

What grows upside down? (Icicle)

Which path has never been walked before? (According to the milky)

When it is needed, it is thrown away; when it is not needed, it is picked up. (Anchor)

They don't eat it raw, but throw it away boiled. (Bay leaf)

What happens if a red scarf is dipped into the Black Sea? (It will get wet)

What's the best? What is the most valuable thing? What is the shortest? What's the sweetest thing? (Life)

From under the gate you can see eight dog paws. How many dogs are outside the gate? (Two)

Where is there no fish? (On the land)

How many years in a year? (one summer)

What color is the bun's hair? (Kolobok has no hair)

Where is it found that a horse jumps over a horse? (in chess)

When you can not answer the question "Are you sleeping?" (When do you sleep)

Which question cannot be answered with "Yes" (Are you already asleep?)

Which hand is best to stir the soup? (with a spoon)

Why do ducks swim? (From the shore)

When the cat is washed, what is it like? (Wet)

Which wheel on a car does not rotate while driving? (Spare)

Which mug should not be drunk from? (From empty)

Why do we have breakfast? (At the table)

What kind of horses do not happen in the river? (dry)

What is the name of the boomerang that didn't come back? (Stick)

Why do you go to bed when you want to sleep? (By gender)

Why is there a tongue in the mouth? (Behind the teeth)

Name the word in which 40 vowels (Forty)

One driver did not take his driver's license with him. There was a one-way sign, but he moved in the opposite direction. The policeman saw this but did not stop him. Why? (The driver was walking)

Can it rain for two days in a row? (No, between them is the night)

What always increases and never decreases? (Age)

The person is completely healthy, not dead, not disabled, but they take him out of the hospital in their arms. (Newborn)

We offer 15 interesting riddle questions for adults and children, the answers to which may be unexpected.

You will find the answers to these questions below. Try to answer the questions yourself first.

1. Two people approach the river. Near the shore is a boat that can only support one. Both men crossed to the opposite bank. How?

2. Where is it found that the horse jumps over the horse?

3. 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:
- Come here immediately. 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?

4. The jar is on the table. It stands in such a way that one half of it is in the air and the other is on the table. What is in the jar if it falls in half an hour? And why?

5. A man went to sea and got into a storm. He was taken to an island where there were no men, and only girls lived. In the morning he woke up covered in ropes at some kind of ritual and found out that they wanted to kill him. And he asked for the last word. After he said it, the girls made a boat for him, gave him food, water and sent him home. What did he say?

6. A 1st grade student solves this riddle in 5 minutes, a high school student in 15 minutes, a student in 1 hour, a professor will never solve it. Riddle: decipher odtchpshsvdd

7. One train travels from Moscow to St. Petersburg with a delay of 10 minutes, and the other - from St. Petersburg to Moscow with a delay of 20 minutes. Which of these trains will be closer to Moscow when they meet?

8. It is known that among the nine coins there is one false, which has less weight than the rest. How to determine a counterfeit coin using a weighing pan in two weighings?

9. There are two cords, each of which burns for an hour, but burns unevenly. How to use these two cords and matches to measure 45 minutes?

10. 2 bricks were placed on a smooth board - one flat and the other on the edge. Bricks weigh the same. Which brick will slide first if the board is tilted?

11. Cat - 3 Horse - 5 Rooster - 8 Donkey - 2 Cuckoo - 4 Frog - 3 Dog -?

12. Three criminals met: the bear cub Belov, the burglar Chernov and the pickpocket Ryzhov. “It's amazing that one of us has black, the second white, and the third red hair, but none of the hair color matches the last name,” said the black-haired man. “And it’s true…”, said Belov the bear-cub. What color is the pickpocket's hair?

13. You are standing in front of three switches. Behind an opaque wall are three light bulbs in the off state. You need to manipulate the switches, go into the room and determine which light bulb belongs to which switch.

14. There is a concrete wall 3 meters high, 20 meters long and weighing 3 tons. How to knock it down without any aids and tools?

15. A father with two sons went on a campaign. On their way they met a river, near the bank of which there was a raft. He stands on the water either a father or two sons. How to cross to the other side of the father and sons?

Answers to 15 questions

1. They were on different banks.
2. In chess.
3. Because Holmes didn't tell him the address.
4. Ice
5. Let the ugliest kill me.
6. 1,2,3,4…
7. At the time of the meeting, they will be at the same distance from Moscow.
8.1st weighing: 3 and 3 coins. The counterfeit coin is in the pile that weighs the least. If they are equal, then the fake is in the third pile.
2nd weighing: From the pile with the smallest weight, 1 and 1 coin are compared. If equal, then the fake is the remaining coin.
9. It is necessary to set fire to the first cord at the same time from both ends - this is 30 minutes. Simultaneously with the first cord, we set fire to the second cord from one end, and when the first cord burns out in 30 minutes, we set fire to the second cord from the other end - we get the remaining 15 minutes.
10. The bricks will start sliding at the same time. Both bricks press on the board with the same force, which means that the friction forces that they have to overcome are also the same. The specific friction forces per square centimeter of the area of ​​​​contact between the bricks and the board, of course, are not equal. But the total friction forces acting on the bricks, equal to the product of the specific friction force and the contact surface area, will be the same.
11. Cat - meow (3), Horse - and-go-go (5), Rooster - ku-ka-re-ku (8), Donkey - i-a (2), ..., Dog - woof (3)
12. Belov is not white because of his surname and not black, since he answered the black-haired one. That is, Belov is red. Chernov is not black because of his surname and not red, since Belov, our bear cub, is red. Ryzhov's pickpocket remained black.
13. Turn on two switches. Turn off one after a while. Enter the room. One bulb will be burning from the switched on switch, the second hot - from the on and off, the third - cold, from the untouched
14. The thickness of such a wall will be no more than two centimeters, which allows you to push it with your hand
15. Both sons cross first. One of the sons returns to his father. The father moves to the opposite bank to his son. The father remains on the shore, and the son crosses to the original shore after his brother, after which they both cross to the father.

/ 10 logic puzzles to determine professional suitability for the role of an investigator.

#1 riddle
The guy meets the girl, they love each other. On Saturday evening they should see each other, the girl is preparing for the meeting. An hour before the appointed time, an SMS arrives: “Sorry, dear, we won’t be able to see each other. I’m with my parents, guests have come to them, they’ll be late, I’ll have to stay there for the night. We’ll meet tomorrow, I kiss you, I love you.” The girl understands that the guy is lying to her . How did she understand?

#2 riddle
There is a guard at the entrance to the bank vault. A spy lurked nearby. One employee of the bank approaches the guard, the guard says to him: "Six." The employee in the answer: "Five." The guard missed. The next one comes up - guard: "Five", clerk: "Four". The guard missed. The spy took a risk, the guard came up: "Four", the spy: "Three". A guard yelling: "Wrong, got caught, you bastard!" twisted the spy. Question: why wrong and what is the correct answer.

#3 riddle
Several firms were engaged in the sale of goods, using specially prepared catalogs for this purpose. Since the goods of the firms were almost the same, then the contingent of customers they had was the same, as well as their number. Soon one of the firms changed its catalog. At first glance, it seemed that he only lost from these changes and became less in demand. However, after the change, sales from this firm went better than those of competitors. What change did they make and how did it work?

No. 4th riddle
Going on a 30-day vacation, the doctor gave the patient 30 tablets of remedy "A" and 30 tablets of remedy "B". You need to take these medicines every day for 30 days and strictly one tablet of each remedy per day, otherwise death is inevitable. Tablets outwardly are absolutely identical, weight, density, etc. are also completely the same. Once the patient took out 1 tablet from one package, and dropped 2 from the other, and all 3 tablets were mixed up. How to follow the doctor's instructions?

#5th riddle
It is shaped like the moon, but like the weather it is different. It has a sunset, like the sun and a dawn. Another important sign confuses us: - It is able to "contain" any object in itself.

#6th riddle
The person who buys this does not use it himself. The person who produces it does not produce it for himself. The person who uses it does not know about it. What is it?

No. 7th riddle
There are three switches in the room, each connected to one lamp. Find a way to define a switch-light bulb pair. If the light bulbs are in another room and you can enter it only once.

#8th riddle
The woman lives on the 12th floor of the building. Every morning, going to work, she calls the elevator to the 12th floor and descends in it to the first floor. But in the evening, returning from work, she takes the elevator only to the 7th floor, and then, to get to her apartment, she overcomes another 5 floors on foot. Why?

#9th riddle
Yuri and Tatyana have been friends since childhood. Yura has equal brothers and sisters. Tatyana has three times as many sisters as Yuri, and only as many as the children of Yura's parents. How many sisters does Tatyana have and brothers and sisters does Yuri have?

#10th riddle
Vasya, Petya and Kolya live next door in a house on Elovaya Street in apartments 15, 17 and 19. Each of them has a special door - one is painted red, another blue, and the third dark green. Petya's door is blue. He works as a mechanic and is friends with Vasya, who lives in apartment 15. Neither Vasya nor Petya get along with Kolya. In apartment 17 - a red door. Determine where each of them lives and what color his door is.

No. 1 Answer:
If he really is with his parents, he should have written "stay here for the night"

No. 2 Answer:
In the word "six" - five letters, in the word "five" - ​​four, in the word "four" - six.
The answer is six.

No. 3 Answer:
They began to produce their catalog smaller than the catalogs of other companies, which is why this catalog always had to be placed at the top of the pile.

#4 Answer:
It is necessary to get one more tablet from the first package - a total of 4. Cut everything in half. On one day, take 4 left halves, on the other - 4 right ones. The main thing to remember is where the half of which pill is.
or
Add another tablet, grind to powder, mix, and divide into two parts

#5 Answer:
EYE
P.S. If you look into the eye of a person looking at the moon, you will see the moon there.

#6 Answer:
This is a coffin.

No. 7 Answer:
You need to turn on two switches. Turn off one after a while. Enter the room. One bulb will be burning from the switch on, the second hot - from the on and off, the third - cold, from the untouched switch.

#8 Answer:
This woman is very small: she can only reach the button for the 7th floor in the elevator car.

#9 Answer:
Yuri has 1 brother and 1 sister. Tatyana has 3 sisters

#10 Answer:
Vasya lives in room 15 behind a dark green door. Kolya lives in room 17, behind the red door. Petya lives in room 19, behind the blue door