Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

What is the coolest letter in the alphabet?

Can you find out who is the kidnapper in below Picture and why, Explain ?

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

It is always ahead of me yet I can never see it. What is it?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Replace the question mark with the correct number in below Picture:

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?