what's the probability of getting a king or a queen from a pack of 52 cards?

how come the second man dies?

What makes this number unique: 8,549,176,320?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

A father's child, a mother's child, yet no one's son.

Who am I?

Can you solve the rebus below?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

When 99 is considered higher than 100?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

What is harder to catch the faster you run?