Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Why is it very easy to weigh a fish?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Find the next number in the following series:
6, 14, 26, 98, __?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What does this mathematical rebus means ?

You were playing ping pong with your friend. Suddenly the ball fell into a narrow metal pipe that was imbedded in the concrete surface of the floor one foot deep. Now you don't have any other ball and you desperately want to take it out and play. You and your friend have your shoelaces, your tennis paddle and a plastic water bottle. However, the bottle cannot fit into the pipe.

How will you take the ball out?