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Mind Teasers : FAQ Riddle

Difficulty Popularity

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to the death toll being so high. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail which proved so deadly. What was it?

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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 : Math Picture Brain Teaser

Difficulty Popularity

In the photo attached with this question, you have to place the numbers from 1 to 19 in the circles such that if we add up any side of the triangle, the sum is 17.

  • Views : 80k+
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Mind Teasers : Box Ball Logic Problem

Difficulty Popularity

There are three bags.The first bag has two blue rocks. The second bag has two red rocks. The third bag has a blue and a red rock. All bags are labeled but all labels are wrong.You are allowed to open one bag, pick one rock at random, see its color and put it back into the bag, without seeing the color of the other rock.

How many such operations are necessary to correctly label the bags ?

  • Views : 70k+
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Mind Teasers : Maths Magic Riddle

Difficulty Popularity

I can prove why 1 = 2

Step1. Lets say y = x
Step2. Multiply through by x xy = x2
Step3. Subtract y2 from each side xy - y2 = x2 - y2
Step4. Factor each side y(x-y) = (x+y)(x-y)
Step5. Divide both sides by (x-y) y = x+y
Step6. Divide both sides by y y/y = x/y + y/y
Step7. And so... 1 = x/y + 1
Step8. Since x=y, x/y = 1 1 = 1 + 1
Step9. And so... 1 = 2

How is this possible ?

By Admin
  • Views : 60k+
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Mind Teasers : Crack the code Riddle

Difficulty Popularity

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
-> Sum of 5th number and 3rd number is 14.
-> Difference of 4th and 2nd number is 1.
-> The 1st number is one less than twice the 2nd number.
->The 2nd number and the 3rd number equals 10.
->The sum of all digits is 30.

Crack the code ?

  • Views : 80k+
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Mind Teasers : Number Sequence Problem

Difficulty Popularity

Identify the next two numbers in this Sequence ?

101, 112, 131, 415, 161, 718, ???, ???


  • Views : 70k+
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Mind Teasers : Picture Mind Teaser

Difficulty Popularity

You are given with six marbles of three different colors. Arrange them in a manner that each one of them touches all four marbles of different colors.

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

Mind Teasers : Popular Tricky Picture Death Riddle

Difficulty Popularity

AS you can see the picture, all you have to do is analyze it and tell who all from the pictured people will die if the person at E pushes the round object to the slide on the slope. Keep in mind all the physics and the terrain while you analyze the things.

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

Mind Teasers : The Better Proposal Puzzle

Difficulty Popularity

A 12-year footballer Lavy was offered a contract with a club name "Flyball" that if he will practice 1 hour extra after school he will be offered 11$ after every week.
Lavy, however, suggested an alternative paid method in which
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till 11th day.

Should the club accept the offer of Lavy?

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

Mind Teasers : Three Errors In Sentence Problem

Difficulty Popularity

Can you fynd three errors in that puzzle?

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