Find the value of "?" in the ball picture Riddle below:

There is a place where if I stand up straight, I will still be considered sideways.

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Prove that twice of ten is the same as twice of eleven.

What is the next number in this series?

4,12,84,3612....

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

Who has married many women but was never married?