Scientists have proved that it is useful to strain your brain from time to time, because he, like muscles, needs training. Your attention - simple problems with a dirty trick that many will confound.
At any age it is useful to shake the brains - both as entertainment, and for the development of thinking. We do not suggest you to solve problems from the school or university program, because it is boring, but a few interesting situational issues with a dirty trick is another matter. You will be surprised when you learn the answers, because they lie on the surface (solutions - at the end of the article).
1. Where is my head?
At what point can we assume that a person is at home without a head?
2. The problem about trains
Two trains are moving: one 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 train will be closer to Moscow, when will they meet?
3. Mysterious criminals
Behind the bars are three criminals: Belov, Chernov and Ryzhov. "Among us there is a man with black, white and red hair, but none of them have the same color as the hair with a surname," the black-haired man said. "It's true ...", said Belov. Determine the hair color of each offender.
4. Simple comparison
A simple task for the student: what is more - the sum of all the figures or their product?
5. Elementary for children
The riddle, which the first-grader decides in five minutes, and it is difficult for adults to find the right answer. You need to decipher - odchpshsvdd.
6. Wordplay
From which word is it necessary to delete one letter so that only two letters remain?
7. Crossing the river
Near the river there are two men, and at the shore there is a boat that can stand one person. As a result, both men managed to cross to the opposite shore. How could they do this?
8. An insuperable barrier
Before you stands a wall with a height of 3 m, a length of 20 m and a weight of 3 tons. What should I do to break the barrier without tools and tools?
9. The mysterious island
The man sailed on a boat and got into a storm. As a result, he was on an island where only women lived. In the morning the man woke up bound and found out that a ritual would be held on which he would be killed. He asked for the last word and after that they let him go home. What did he say?
10. How to turn on the bulbs correctly?
There are three switches in front of you, and behind the door in the room there are three non-burning light bulbs. The task is to manipulate the switches, and then go into the room, and determine which light bulb to which switch corresponds.
11. Magic Tableware
What kind of dishes can not be eaten?
12. Unique horses
Where can you see a horse jumping over another horse?
13. Security - above all
How can you jump off a ladder that has a height of 10 m and not get injured?
14. How correctly to weigh?
There are six coins on the table, among which is a fake, and its weight is less than that of the rest. How to determine a fake with the help of cup scales for two weighings?
15. Unusual bank
On the table is an ordinary bank, which is located in such a way that one half is in the air, and the other is on the table. What is in the bank if in 30 minutes the bank falls, and what is the reason for this?
Answers:
- When he peeks out of the window.
- They will be at the same distance.
- Belov is not white because of his surname and not black, because he answered the black-haired cellmate. Conclusion - Belov has red hair. Chernov is not black and not red, which means he has white hair. Remains Ryzhov with black hair.
- The more the sum, because one of the factors will be 0, and, consequently, the result is also 0.
- The first letters of the digits are from 1 to 10.
- From the word "primer" the letter is removed and only "ry" remains.
- The men stood on different banks.
- It can be filled up by pushing your hand, because its thickness will not be more than 2 cm.
- "Let the ugliest kill me."
- It is necessary to turn on two switches and after a while turn off one. After that, you can go into the room. The on / off switch will correspond to the light bulb. A hot light bulb will correspond to the switch that has been turned on and off, and the cool one belongs to the third switch.
- Empty.
- In chess.
- You can also jump from the first step, because there were no restrictions.
- First we weigh two piles of three coins to determine the one that is lighter. The second time we weigh two coins and if they are equal, the fake is the remaining coin.
- Ice.