How clever are you? These brainteasers are especially meant to test how resourceful and clever you are. Some of them are extremely tricky and require clever approaches. See if you can get them! I will not post the answers, as this will only spoil the fun.
***** VERY HARD
**** HARD
*** MEDIUM
** FAIRLY EASY
* EASY
GRADING:
All 7 correct: Extremely sharp and clever.
5-6: Very clever.
3-5: Pretty clever
1-2: Average
0: Not so clever.
****
1)In a certain country, no person may enter a train carrying an object more than 1 metre long. A man would like to carry his sword on the train, but the sword measures is a few cm over 1 metre. How can he carry it on the train? HINT: He is allowed to use something.
***
2)A man has to cross a bridge, and needs to carry three bags with him. The bridge can only withstand a total weight of 120 pounds. The man weighs 100 pounds, and bags weigh 10, 5, and 7 pounds. How can he get across the bridge in one go with all the bags? (Just to let you know, he does not throw them across.)
*****
3)There are an infinite number of spots on earth where you can travel one mile south, one mile east, and then one mile north, and then end up at the same place. However, there are three main answers. Can you find them?
***
4)A sailboat travels around the equator. What part of the boat has traveled the furthest?
**
5)A man has two sons. One day he buys a cake for them and wants to give half to each son. However, from past experience, he knows that if he cuts the cake in half, one brother will always complain that the other got a bigger piece. What can he do so that he avoids the same problem this time? (Find the simplest solution, without using any devices.)
****
6)Ok, so you're in a basement and there are three switches. Upstairs there are three light bulbs. Each switch in the basement is connected to one of the light bulbs, but you don't know which one switch is connected to which bulb. All of the switches are initially in the off position. You are allowed to turn them on and off in any combination. After you are done, you can go upstairs ONLY TIME to see which switch corresponds to which light bulb. How is this possible?
*
7)You have two buckets - one holds exactly 5 gallons and the other 3 gallons
How can you measure out 4 gallons of water into the 5 gallon bucket ? (Assume that you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)
***** VERY HARD
**** HARD
*** MEDIUM
** FAIRLY EASY
* EASY
GRADING:
All 7 correct: Extremely sharp and clever.
5-6: Very clever.
3-5: Pretty clever
1-2: Average
0: Not so clever.
****
1)In a certain country, no person may enter a train carrying an object more than 1 metre long. A man would like to carry his sword on the train, but the sword measures is a few cm over 1 metre. How can he carry it on the train? HINT: He is allowed to use something.
***
2)A man has to cross a bridge, and needs to carry three bags with him. The bridge can only withstand a total weight of 120 pounds. The man weighs 100 pounds, and bags weigh 10, 5, and 7 pounds. How can he get across the bridge in one go with all the bags? (Just to let you know, he does not throw them across.)
*****
3)There are an infinite number of spots on earth where you can travel one mile south, one mile east, and then one mile north, and then end up at the same place. However, there are three main answers. Can you find them?
***
4)A sailboat travels around the equator. What part of the boat has traveled the furthest?
**
5)A man has two sons. One day he buys a cake for them and wants to give half to each son. However, from past experience, he knows that if he cuts the cake in half, one brother will always complain that the other got a bigger piece. What can he do so that he avoids the same problem this time? (Find the simplest solution, without using any devices.)
****
6)Ok, so you're in a basement and there are three switches. Upstairs there are three light bulbs. Each switch in the basement is connected to one of the light bulbs, but you don't know which one switch is connected to which bulb. All of the switches are initially in the off position. You are allowed to turn them on and off in any combination. After you are done, you can go upstairs ONLY TIME to see which switch corresponds to which light bulb. How is this possible?
*
7)You have two buckets - one holds exactly 5 gallons and the other 3 gallons
How can you measure out 4 gallons of water into the 5 gallon bucket ? (Assume that you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)






