• Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Famous Science Problem

Difficulty Popularity

Suppose we drop
1. A 50 kg metal ball
and
2. A 40 kg ball of silk
from a height of 100 meters.

which will reach the ground first ?

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

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

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)

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

Mind Teasers : Thinking Age Brain Teaser

Difficulty Popularity

Two friends , Torres and Lampard, meet after a long time.

Torres: Hey, how are you man?
Lampard: Not bad, got married and I have three kids now.
Torres: That's awesome. How old are they?
Lampard: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Torres: Cool..But I still don't know.
Lampard: My eldest kid just started taking piano lessons.
Torres: Oh now I get it.

How old are Lampard's kids?

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

Mind Teasers : Tricky Logical Puzzle

Difficulty Popularity

There are two arch enemy Dhuryodhan and Bheem.
One day two are going together and a god appeared in from of them.
The God grant three wishes to Bheem and one to Dhuryodhan.

Dhuryodhan replied smartly 'Give me twice of whatever Bheem ask for'.

For 1st wish Bheem asked the god 'Give me a room full of money'. Soon Dhuryodhan gets two room full of money.
For 2nd wish Bheem asked the god 'give me 100 slaves'. Soon Dhuryodhan gets 200 slaves.

Whats should be Bheem third wish ?

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

Mind Teasers : Terrorist Attack Security Puzzle

Difficulty Popularity

UNO plans a gathering.
However there is threat of terrorist attack. So security guard who is a mathematical plans somethings to secure the place.

A terrorist stands nearby the door where
1st ambassador comes , the security guard said 'twelve' and ambassador replied with 'six'.
2nd ambassador comes , the security guard said 'six' and ambassador replied with 'three'.

The terrorist thinks its enough and walks to the door.
The security person said 'eight' , terrorist replied 'four' and get immediately arrested.

why ?

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

Mind Teasers : Maths Logical Riddle

Difficulty Popularity

Two mathematicians Steven and James were sitting face to face when Steven came up with an idea in mind. He scribbled something on the table and told James to read it. James said that it was wrong. Steven said it is absolutely right.

What would Steven have scribbled to make both of them correct?

  • 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 : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Smart Trick Puzzle

Difficulty Popularity

A local magician is performing his favorite trick to be under water for approx 10 minutes.

I went to the magician and told him that i can be under the water for 20 minutes.
He laughed and den responded "I will give you 1000 pounds , if you can do this"

I won the bet and get 1000 pounds.

what did i do ?

  • 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 : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Candle Trick Teaser Problem

Difficulty Popularity

Husband has prepared for a candle light dinner on the honeymoon for his wife. While they were having the dinner, a strong breeze flew through the open window and four candles out of ten were extinguished. After that, the husband closed the window.

How many candles were left in the end?

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