15 riddles with a trick. Expanding consciousness.
1. Two people approach the river. There is a boat at the shore that can only support one. Both people crossed to the opposite bank. How?
2. Where does it happen that a horse jumps over a 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. Tel. in the book he found her husband's number. He called. Speaks:
- Come here urgently. Your wife has died. 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. He was the one who killed her. Question: Why did Sherlock think that?
4. The jar is on the table. It stands so 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 carried to an island where there were no men, and only girls lived. In the morning he woke up covered in ropes at some ritual and found out that they wanted to kill him. And he asked the last word. After he told him, the girls made him a boat, 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 counterfeit, which weighs less than the others. How can you identify a counterfeit coin in two weighings using a cup scale?
9. There are two cords, each of which burns for an hour, but burns unevenly. How can you measure 45 minutes using these two cords and matches?
10. Place 2 bricks on a smooth board - one flat and the other on an edge. The bricks weigh the same. Which brick will slide off first if you tilt the board?
11. Cat – 3 Horse – 5 Rooster – 8 Donkey – 2 Cuckoo – 4 Frog – 3 Dog -?
12. Three criminals met: the bugbear Belov, the burglar Chernov and the pickpocket Ryzhov. “The amazing thing is that one of us has black hair, the second one has white hair, and the third one has red hair, but none of us have the same hair color as their last name,” said the black-haired man. “It’s true...” said the bugbear Belov. What color is the pickpocket's hair?
13. You are standing in front of three switches. Behind an opaque wall are three light bulbs that are turned off. 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 bring her down without having any aids and tools?
15. A father and two sons went on a hike. On their way they met a river, near the bank of which there was a raft. It can support either a father or two sons on the water. How can father and sons cross to the other side?
Don't peek) Think for yourself first.
15 fun riddles with a trick!
1. Two people approach the river. There is a boat at the shore that can only support one. Both people crossed to the opposite bank. How?
2. Where does it happen that a horse jumps over a horse?
3. Sherlock Holmes walked 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. Tel. in the book he found her husband's number. He called. Speaks:
- Come here urgently. Your wife has died. 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. He was the one who killed her. Question: Why did Sherlock think that?
4. The jar is on the table. It stands so 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 carried to an island where there were no men, and only girls lived. In the morning he woke up covered in ropes at some ritual and found out that they wanted to kill him. And he asked for the last word. After he told him, the girls made him a boat, 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 counterfeit, which weighs less than the others. How can you identify a counterfeit coin in two weighings using a cup scale?
9. There are two cords, each of which burns for an hour, but burns unevenly. How can you measure 45 minutes using these two cords and matches?
10. Place 2 bricks on a smooth board - one flat and the other on an edge. The bricks weigh the same. Which brick will slide off first if you tilt the board?
11. Cat – 3, horse – 5, rooster – 8, donkey – 2, cuckoo – 4 frog – 3, dog –?
12. Three criminals met: the bugbear Belov, the burglar Chernov and the pickpocket Ryzhov. “The surprising thing is that one of us has black hair, the second one has white hair, and the third one has red hair, but none of us have the same hair color as the last name,” said the black-haired man. “It’s true...” said the bugbear Belov. What color is the pickpocket's hair?
13. You are standing in front of three switches. Behind an opaque wall are three light bulbs that are turned off. 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 her down without any aids or tools?
15. A father and two sons went on a hike. On their way they met a river, near the bank of which there was a raft. It can support either a father or two sons on the water. How can father and sons cross to the other side?
Don't peek. Think for yourself first!
1. They were on different banks.
2. In chess.
3. Because Holmes didn't tell him the address.
5. Let the ugliest one kill me.
7. At the moment 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 less. If they are equal, then the fake is in the third pile. 2nd weighing: From the pile with the least weight, 1 and 1 coin are compared. If they are equal, then the remaining coin is fake.
9. You need to light the first cord at both ends at the same time - this is 30 minutes. Simultaneously with the first cord, we light the second cord from one end, and when the first cord burns out in 30 minutes, we light 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 each square centimeter of contact area between the bricks and the board are naturally not equal. But the general frictional forces acting on the bricks are equal to the product specific friction force on the contact surface area will be the same.
11. Cat - meow (3), horse - i-go-go (5), rooster - ku-ka-re-ku (8), donkey - i-a (2), dog - woof (3).
12. Belov is not white because of his last name and not black, since he answered the black-haired one. That is, Belov is red. Chernov is not black because of his last name and not red, since our bugbear Belov is red. Ryzhov's pickpocket remained black.
13. Turn on two switches. After some time, turn one off. Enter the room. One light bulb will be lit from the switch on, the second will be hot from being turned on and off, the third will be cold from the untouched one.
14. The thickness of such a wall will be no more than two centimeters, which allows you to push it with your hand.
15. First, both sons cross. One of the sons returns back to his father. The father moves to the opposite bank to join his son. The father remains on the shore, and the son is transported to the original shore after his brother, after which they both are transported to their father. 
2 guys approached the river bank, both need to get to the other bank, but on the bank there is only one flimsy boat that can only support one person. You can’t swim across the river, and you can’t cling to the boat either. How can two guys get to the other side using only one boat?
You are in a boat, the boat is standing in the middle of a quiet lake. You have a rope that is approximately 2 meters long, can you use this rope, throw it into the water and jerk sharply to get to the shore?
Similar question to problem 2(a), but this time you are in space on the same boat, and you have the same rope. Will you, just like in the previous question, be able to get to the shuttle by boat by throwing a rope and pulling sharply?
1. The problem statement says that 2 guys approached the bank of the river, it was not specified how and to which bank specifically, the answer is simple, both guys approached the bank with different sides rivers.
2. (a)(b). The boat can actually be moved in still water this way. While the person moves to the bow, the friction between the boat and the water prevents any backward movement of the boat, and the inertial force of the push is enough to overcome the resistance of the water and, transferring a positive impulse to the boat, move it forward. A space “boat” in the absence of friction cannot move in this way.
Faktrum publishes a selection of exciting brain teasers.
1. Two people approach the river. There is a boat at the shore that can only support one. Both people crossed to the opposite bank. How?
2. Where does it happen that a horse jumps over a horse?
3. Sherlock Holmes walked 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. He found her husband's number in the phone book and called. Speaks:
- Come here urgently. Your wife has died.
After some time, the husband arrives, looks at his wife and says:
- Oh, honey, what happened to you???
Then the police arrive. Sherlock points his finger at the woman's husband and says:
- Arrest this man. He killed his wife!
Question: Why did Sherlock think that?
4. The jar is on the table. It stands so 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 caught in a storm. He was carried to an island where there were no men, and only girls lived. In the morning he woke up covered in ropes at some ritual and found out that they wanted to kill him.
The man asked for the last word.
After he told him, the girls made him a boat, 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, but 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 counterfeit, the weight of which is less than the rest. How can you identify a counterfeit coin in two weighings using a cup scale?
9. There are two cords, each of which burns for an hour, but burns unevenly. How can you measure exactly 45 minutes using these two cords and matches?
10. 2 bricks were placed on a smooth board - one flat and the other on an edge. The bricks weigh the same. Which brick will slide off first if you tilt the board?
11. Cat - 3, horse - 5, rooster - 8, donkey - 2, cuckoo - 4, frog - 3, dog - ?
12. Three criminals met: the bugbear Belov, the burglar Chernov and the pickpocket Ryzhov. “The surprising thing is that one of us has black hair, the second one has white hair, and the third one has red hair, but none of us have the same hair color as the last name,” said the black-haired man. “It’s true...” answered the bugbear Belov. What color is the pickpocket's hair?
13. You are standing in front of three switches. Behind an opaque wall are three light bulbs that are turned off. You need to manipulate the switches, go into the room and determine which light bulb each switch belongs to. How will you do this?
14. There is a concrete wall 3 meters high, 20 meters long and weighing 3 tons. How to knock her down without any aids or tools?
15. A father and two sons went on a hike. On their way they met a river, near the bank of which there was a raft. It can support either a father or two sons on the water. How can both father and sons cross to the other side?
1. Two people approach the river. There is a boat at the shore that can only support one. Both people crossed to the opposite bank. How?
2. Where does it happen that a horse jumps over a horse?
3. Sherlock Holmes walked 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.
Tel. in the book he found her husband's number. He called. He says: “Come here urgently.” Your wife has died. 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.” He was the one who killed her. Question: Why did Sherlock think that?
4. The jar is on the table. It stands so 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 carried to an island where there were no men, and only girls lived. In the morning he woke up covered in ropes at some ritual and found out that they wanted to kill him. And he asked for the last word. After he told him, the girls made him a boat, 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 counterfeit, which weighs less than the others. How can you identify a counterfeit coin in two weighings using a cup scale?
9. There are two cords, each of which burns for an hour, but burns unevenly. How can you measure 45 minutes using these two cords and matches?
10. Place 2 bricks on a smooth board - one flat and the other on an edge. The bricks weigh the same. Which brick will slide off first if you tilt the board?
11. Cat - 3 Horse - 5 Rooster - 8 Donkey - 2 Cuckoo - 4 Frog - 3 Dog -?
12. Three criminals met: the bugbear Belov, the burglar Chernov and the pickpocket Ryzhov. “The amazing thing is that one of us has black hair, the second one has white hair, and the third one has red hair, but none of us have the same hair color as their last name,” said the black-haired man. “It’s true...” said the bugbear Belov. What color is the pickpocket's hair?
13. You are standing in front of three switches. Behind an opaque wall are three light bulbs that are turned off. 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 her down without any aids or tools?
15. A father and two sons went on a hike. On their way they met a river, near the bank of which there was a raft. It can support either a father or two sons on the water. How can father and sons cross to the other side? Don't peek) Think for yourself first.
1. They were on different banks.
2. In chess.
3. Because Holmes didn't tell him the address.
5. Let the ugliest one kill me.
7. At the moment 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 less. If they are equal, then the fake is in the third pile. 2nd weighing: From the pile with the least weight, 1 and 1 coin are compared. If they are equal, then the remaining coin is fake.
9. You need to light the first cord at both ends at the same time - this is 30 minutes. Simultaneously with the first cord, we light the second cord from one end, and when the first cord burns out in 30 minutes, we light 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 each square centimeter of contact area between the bricks and the board are naturally not equal. But the total frictional forces acting on the bricks, equal to the product of the specific frictional force and the contact surface area, will be the same.
11. Cat - meow (3), Horse - i-go-go (5), Rooster - ku-ka-re-ku (8), Donkey - i-a (2),..., Dog - woof ( 3)
12. Belov is not white because of his last name and not black, since he answered the black-haired one. That is, Belov is red. Chernov is not black because of his last name and not red, since our bugbear Belov is red. Ryzhov's pickpocket remained black.
13. Turn on two switches. After some time, turn one off. Enter the room. One light bulb will be lit from the switch on, the second hot - from the switch turned 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. First, both sons cross. One of the sons returns back to his father. The father moves to the opposite bank to join his son. The father remains on the shore, and the son is transported to the original shore after his brother, after which they both are transported to their father.
Taisiya Sergeenko
