When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

What you cannot hold but it is yours?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

What does this rebus means ?

PROG WORKRESS

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

What Adam and Eve do not have but the rest of the people have?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?