• Views : 30k+
  • Sol Viewed : 10k+

Mind Teasers : Hard How Many Squares On A Chessboard

Difficulty Popularity

You can find a chessboard with two rooks in the attached figure. Now, the question is - how many squares (of any size) exists that don't have the rooks in them?

Can you find out?

Discussion
Suggestions
  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Terrorist Plane Hijack Puzzle

Difficulty Popularity

A terrorist hijacks a plane with 10 passengers and there is lots of gold in the plane.
After talking the gold , he asked the government officials for 11 parachutes.
He killed all the passenger so that no one can identify him , take one parachute and jumps off.

Was he stupid to ask for 11
parachutes if he need only one ?

  • Views : 90k+
  • Sol Viewed : 30k+

Mind Teasers : Extremely Hard Civil Services Problem

Difficulty Popularity

( ) + ( ) + ( ) + ( ) + ( ) = 30
This is what you have for equation. The following are the numbers that you can use to fill in the brackets:
1, 3, 5, 7, 9, 11, 13 and 15

You can repeat the numbers if required. The resulting sum should be 30.

This question appeared in the UPSC final examination in December 2013. Out of all the people who appeared, only one guy was able to solve this namely Gaurav Agarwal.

Can you solve it?

  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Famous Lion Tamer Interesting Puzzle

Difficulty Popularity

You are trapped with a lion in a cage with 1 unit as its radius. Both you and the lion can run effortlessly at the speed of one unit.

1) The lion is quite hungry and all he wants is to catch you and eat you up. Will he be able to do that?
2) If yes, how long do you have till he does that?

  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Difficult Brain Twister

Difficulty Popularity

A strange tradition is followed in an orthodox and undeveloped village. The chief of the village collects taxes from all the males of the village yearly. But it is the method of taking taxes that is interesting.

The taxes paid in the form of grains and every male should pay equal pounds corresponding to his age. In simpler terms, a man aged 10 years will have to pay 10 pounds of grains and a 20 years old will be paying 20 pounds of grain.

The chief stands on a riser containing 7 different weights next to a large 2 pan scale. As per the interesting custom, the chief can only weigh using three of the seven weights.

In such a scenario, can you calculate what must be the weights of the seven weights each and who is the oldest man the chief can measure using those weights?

  • Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Cricket Riddle

Difficulty Popularity

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Detective Murder Or Suicide Puzzle

Difficulty Popularity

A homicide team enters a crime scene where a dead body of a fat old man lies there on the floor with blood oozing out of his head. The victim is holding a gun and a tape recorder lies there by his side. One of the detective picks up the recorder and plays it "I am tired of this life and hence I have decided to relieve myself from the worldly pains". A gunshot follows the message.

The teams starts investigating a murder investigation.

Why?

  • Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : Famous 13 Cave Logic Problem

Difficulty Popularity

A thief was running from the police after the biggest theft the town saw. He took his guard in one of the thirteen caves arranged in a circle. Each day, the thief moves either to the adjacent cave or stay in the same cave. Two cops goes there daily and have enough time to enter any two of the caves out of them.

How will the cop make sure to catch the thief in minimum number of days and what are the minimum number of days?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Police Investigating Murder Riddle

Difficulty Popularity

A couple went to river rafting on a hill station. Two days after their departure, the husband returned alone. He informed the police that her wife was swept away by the waves and died.

On the next day, police arrived to his doorstep and when he opened the door, they arrested him for murdering his wife. They told him that his travel agent had called them.

He was shocked. How did the travel agent know about the murder? Can you suggest how did he know ?

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Maths Logical Brain Teaser

Difficulty Popularity

A man of faith visits the holy land where three temple are erected in a row offering a surreal divinity to the place. Awestruck at the sight of the magnificent temples, he visits the first temple where he finds that the number of flowers in his basket increases to double the number as soon as he sets his foot inside the temple. Astonished by the miracle he is completely happy and seeks it as a blessing of his god. He offers a few flowers to the stone idol of god and moves out.

Then he visits the second temple, where the same miracle happens again. The number of flowers in his basket again double up in number. With a smile on his face, he offers a few of flowers to the stone idol again and walks out after praying.

The moment he enters the third temple, the number of flowers increases to double again. Now he feels entirely blessed. He offers all the flowers at the feet of the stone idol and walks out in a moment of bliss.

When he walks out, he has no remaining flowers with him. He offered equal number of flowers at each of the temple. What is the minimum number of flowers he had before entering the first temple? How many flowers did he offer at each temple?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Two Men One Question Puzzle

Difficulty Popularity

Imagine that you are travelling to a village. You happen to reach a point in the road where there is a fork. There are two ways that you can go into but only one amongst them is correct and leads to the village. You happen to see two men standing on the fork and you can ask them for the direction. To your bad luck, one amongst the two men always lies and the other one always says the truth. But you do not know who is a liar and who is not. At that point of the situation you are allowed to ask only one question to any one of the men standing there.

What question will you ask?

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