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

Buy me, smell me or deliver me, I do not change.

Who am I?

Which alphabet letter is a question?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

John was piloting a plane behind a car but was never able to overtake it. Why?

Find the smallest sentence with all the English alphabet.

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Can you name an animal whose killing cannot be performed without spilling your own blood?