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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 : Tricky Adam Eve Puzzle

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Stephen died of heart attack. His soul was received in heaven. He was astonished to find himself as young as he had been in his young adult age. He looked around and there were thousands of young and naked people. His eyes searched to find someone familiar and suddenly he noticed Adam and Eve.

How did Stephen recognize them?

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

Mind Teasers : Decipher MatchSticks Puzzle

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Can you decipher the two rows to find the hidden word?

  • Views : 70k+
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Mind Teasers : Photo Riddle Brain Teaser

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In the given picture, there is a fly in the wine glass depicted by the sticks. You have to remove the fly from the glass. You can move only two sticks. Also, you can’t touch the fly

  • Views : 80k+
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Mind Teasers : Dirt Hole Tricky Riddle

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How many cubic meters of dirt are in a hole of 20 meter long and 30 meter wide.

By Admin
  • Views : 70k+
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Mind Teasers : Frequent Maths Digit Brain Teaser

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Can you identify the most common digit between the number 1 and 1000?

By Admin
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Mind Teasers : Supernatural - Who Are We Riddle

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We are the most popular hunters of the world.
We fight against hell.
We kill criminal vampires.
We kill demons.
We always do it together as we are the brother.

Who are we?

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

Mind Teasers : Popular Dice Probability Riddle

Difficulty Popularity

You roll two six sided dices together.

Can you calculate the probability that the first dice gives the number 2 while the second dice gives the number 5?

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?

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

Mind Teasers : Probability To Choose Own Toy Brain Teaser

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I bought three toys for my triplet boys (one for each). I placed the toys in the dark store. One by one each boy went to the store and pick the toy. What is the probability that no boy will choose his own toy?

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Mind Teasers : Induction Brain Teasers

Difficulty Popularity

Three college toppers are summoned by the inspecting faculty. To identify the best from them, the faculty takes them into a room and places one hat on each of their heads. Now all of them can see the hats on other’s heads but can’t see his own. There are two colored hats – green and red.

Now the faculty announces that he had made sure that the competition is extremely fair to all three of them. He also gives them a hint that at least one of them is wearing a red hat. Now the first one who is able to deduce his own hat color will be awarded the most intelligent student of all award. After a few minutes, one of them raises his hand and is able to deduce the color correctly.

How?

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