15 tricky puzzles to practice lateral thinking

riddle 1

A man walks into a bar and asks a glass of water. Instead, the bartender suddenly bangs the tray on the rack, and yelling that the visitor straight in the face. Why?

Enigma 2

The farmer has a large dog, small dog, a cat, a chicken and a little grain. If left unattended, the dog will attack on the dog, the dog - a cat, a cat - on chicken and chicken will eat the grain. Farmer with all his possessions need to cross the river, but the boat is too small, so the farmer could carry at one time more than two. How can do that no one and nothing to eat and no one else was attacked?

riddle 3

You have to deliver an order for a dinner party, but because of the shortcomings of planning are in a situation where you require wine It was not in the terms of supply. Hostess to order very concerned that the wine was just in the designated amount of it - just 6 liters. And all that you have - that's three container in which, as you know, can contain exactly 2, 5 and 7 liters, respectively.

Containers 2 and 5 liters are left empty, and a 7-liter complete. You also have a keg, with which you can pour the liquid from the container into the container without spilling anything. How to measure exactly 6 liters of wine? We need to find the exact solution - to the eye is not good enough!

riddle 4

I went for a walk and found a witness to the crime. A man strapped to the seat of his car and ransacked his pockets. All doors and trunk are locked, windows are completely closed, the machine is not damaged. Everything else is a thief after the crime did not lock the door. How is this possible?

riddle 5

You have three copies of the hourglass. Each clock can be used only once. Once you have them flip, reverse movement of sand is not possible because of the special valve in the heart.

Each of the three copies of hours designed for different times of spilling sand.

• First hourglass are poured for 1 minute.
• Second - 4 minutes.
• Third - 7 minutes.

You need to measure a certain time - 10 minutes. How to make it to the nearest minute, using only three existing copies hourglass?

riddle 6

Rodrik recently moved to a quiet village in the province and is just beginning to get acquainted with the locals. After living in a new place last month, he decides get a haircut. In the village there are two barber, their salons are located on the main street, but in its different ends, so that Rodrik need to decide whom to choose.

Barber, salon which is located at the entrance to the village, always flaunts a beautiful hairstyle, hair was exactly cut and well packed. On the contrary, the hairdresser from the salon at the far end of the street that's near a local park, hair untidy, unkempt and no style. Of hairdresser choose Rodrik?

riddle 7

Which does not happen even once a year, but it happens twice in each month, three times and once in every weekend, every week?

riddle 8

The conference tall people 25 people involved. If each of those present shrug hand only to those who are below its growth, how many handshakes take place?

riddle 9

Imagine that you have four coins.

You can select and remove any or all of them. Do not be lazy - go for these coins from a purse to solve the puzzle. And the problem is this: if you can place four coins so that each simultaneously applied to all the others?

Perhaps this puzzle and you will not become a challenge, but it may come as a surprise. Suffice it to say that the decision it has.

riddle 10

I live in the city, but between the last sunset and sunrise went to bed and wake up with it a staggering amount of time - 90. In addition, before each ascent, I was able to sleep 7 hours. In this case, I do not like to sleep. How is this possible to me?

riddle 11

Six people are in the room. Everyone talks to you in turn. The statements they complete the following phrases, saying them to you one by one in this order:

• Person A: exactly one person lying.
• Person B: two exactly lie.
• Person C: Three exactly lie.
• Person D: four exactly lie.
• Person E: five exactly lie.
• Person F: we are lying.

How many of these people, from the A to the F, told you the truth (if one ever said it)?

riddle 12

Two children went to explore the surrounding area. At some point they have to go through the cave, which is located behind the bushes on the nearest hill. Ignoring instructions to the parents not to do stupid things kids do not hesitate to rush to the cave.

The cave is dark, none of the children do not have a torch, so they can not see where they are going. One of them is far ahead of the other, and raises a cloud of coal dust, where before there was apparently an open tunnel. Frightened by the sudden obstacle, the children rush out of the cave, shouting in horror and delight.

Once out on the open air, both rush straight to their homes. The child, who stumbled on a heap of coal, dirty face, but when he comes home, he is not going to wash. The other person is completely clean, but when he reached the house, he immediately rushes to the sink and vigorously rubs his face.

Knowing that none of the children are not usually sought to wash when he got home, and the fact that their current behavior is absolutely no coincidence, some reasonable explanation can be given to him?

riddle 13

Recently, my mother gave me a pair of cuff links that are inherited from his father. I know that another mother also gave a pair of cufflinks inherited her child. But we are talking about one and the same pair of cufflinks. How can this be?

riddle 14

I carried her to fix his watch to the jeweler, but to get them back, I see that with them that something is wrong. When it should be 3:30, they show 6:15 when it should be 4:45, show 9:20. What's wrong with my watch?

riddle 15

You are in a holiday house in a secluded location. All the electric lights are switched off. You can not ignite them, and you have no other way to illuminate the surrounding area. Nevertheless, you can see everything perfectly, avoiding around the house. Although you do not have night vision devices or anything like that. How is this possible?

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Even more mysteries and puzzles with detailed answers can be found in the book "The lateral logic".

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