10+10 and 11+11 can give you the same answer.

Explain how?

Using Only Five 5's and any mathematical operator make sum as 37

When it is alive we sing, when it is dead we clap our hands. What is it?

What can go up a chimney down, but can’t go down a chimney up?

The more it dries, the wetter it becomes. Can you tell what it is?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?