Replace the question mark with the number below given a simple math problem.

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

You need to remove two matchsticks to make the below equation true. Can you do it ?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Can you name four days which start with the letter 'T'?

Can you place six X (crosses) in below board without making three in a row in any way ?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99