How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

I always drive my customer away.

Who am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Can you count the number of squares in the given picture?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

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?