Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

What is the difference between a jeweller and a jailer?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?