what does this below rebus represent identXQQQQQME

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

Imagine you are in a room with no windows or doors. How will you get out?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I am the fastest animal but cannot climb the tree. What am I?

A man dies of old age on his 25 birthday. How is this possible?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Why is Saturday stronger than Monday?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?