• Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Mathematical Equation Puzzle

Difficulty Popularity

Replace all '#' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

# #
x #
=====
# # #

Discussion
Suggestions
  • 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 : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Perfect Number Maths Question

Difficulty Popularity

A perfect number is defined as a positive number(integer) which is equal to the sum of its positive divisors excluding the number itself.

two examples are mentioned below as :
6 => 1+2+3
12=> 1+2+3+6


Can you find another perfect number which consist of <= 2digits.

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

Mind Teasers : NewsPaper Riddle

Difficulty Popularity

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?

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

Mind Teasers : Famous Water Jug Problem

Difficulty Popularity

You live in Dubai and had an infinite supply of oil and a 5 liters and 3 liters jar,
how would you measure exactly 4 liters (of-course in minimum numbers of step) ?

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

Mind Teasers : Eight Eights Brain Teaser

Difficulty Popularity

Using eight eights and addition only, can you make 1000?

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

Mind Teasers : Logical Maths Gold Bar Brain Teaser

Difficulty Popularity

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

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

Mind Teasers : Maths Pyramid Brain Teaser

Difficulty Popularity

Complete the pyramid my replacing ? with the correct number.
1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
? ? ? ? ? ?
? ? ? ? ? ? ? ?

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

Mind Teasers : Most Popular Logical Puzzle

Difficulty Popularity

Outside a room there are three light switches. One of switch is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

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

Mind Teasers : Pattern Age Puzzle

Difficulty Popularity

If neha is 10
Both Sonali and priyanka is 15
Both sadaf and tanu is 10.

how much is prinka by the same system ?

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

Mind Teasers : Tricky Probabilty Problem To Solve

Difficulty Popularity

Aishwarya was first to board to her flight to delhi.
She forgot her seat number and picks a random seat for herself.
After this, every single person who get to the flight sits on his seat if its available else chooses any available seat at random.
Abhishek is last to enter the flight and at that moment 99/100 seats were occupied.

Whats the probability what Abhishek gets to sit in his own seat ?

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