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?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

What is the next number in the series?

15 29 56 108 208 ?

Can you find a five letter word that is left with only two letters if one is removed?

They are three errirs in this question. Can you find them?