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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?

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Mind Teasers : Maths Equation Brain Teaser

Difficulty Popularity

Arrange four eights(9) and a one(1) and only one mathematical symbol to make it equal to 100

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Mind Teasers : Ias Logic Question

Difficulty Popularity

A guy claims to do the following thing. He puts a coin in a glass bottle. Then, he shuts the mouth of the bottle with the help of a cork. Now he manages to remove the coin out from the bottle without taking out the cork or breaking the glass bottle.

Do you know how he can do it?

By Admin
  • Views : 80k+
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Mind Teasers : 8 Toothpicks Brain Teaser

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Can you form eight squares of three different sizes by moving only two toothpick?

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Mind Teasers : Weight Balance Riddle

Difficulty Popularity

You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.

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

Mind Teasers : World War I History Riddle

Difficulty Popularity

Two companions Terry and Garry were talking about their families. Terry told some great stories about his courageous grandfather who fought for Britain in "World War I". Terry told that his grandfather is so brave that he was awarded a bravery honour medal with words "For our Courageous Soldiers In World War I" embedded into it.

Garry Knows that his friend is lying? How ?

Mind Teasers : Survive The Fire Brain Teaser

Difficulty Popularity

Isaac Newton is stranded on an island covered in forest.

One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Isaac Newton survive the fire? (There are no buckets or any other means to put out the fire)

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

Mind Teasers : The sheep and the grass logical puzzle

Difficulty Popularity

If we tie a sheep to one peg, a circled grass is been eaten by the sheep. If we tie the sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the sheep. If we want an eclipse then we put two pegs then put a rope in between then and the other end of the rope is tied up on the sheep's neck.

Question: how should we tie the peg and the sheep so that a square is eaten out from the garden's grass? We only have one sheep's rope and the peg and the rings.

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

Mind Teasers : What word am I ?

Difficulty Popularity

What word am I?

Insights:

* I am a nine letter word.

* I am the exact inverse to expression 'neighborly and active'

* I contain the word 'over'.

* I begin will a vowel.

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

Mind Teasers : Sunday Probability Riddle

Difficulty Popularity

Whats the probability of getting 5 Sunday(my favorite day) in a 31 day month ?

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

Mind Teasers : Floating Fish MatchStick Riddle

Difficulty Popularity

As shown in the image below, group of fishes are swimming from left to right. By moving just three matchsticks, can you make fishes from right to left?

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