Identify the hidden meaning behind this picture?

It belongs to you, but other people use it more than you do. What is it?

Which tank will fill first?

Can you decipher the two rows to find the hidden word?

No matter how little or how much you use me, you change me every month. What am I?

What came first, the chicken or the egg?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Decode this picture on T-Shirt and tell what it says ?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?