If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Find the missing number in the image below.

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Find the next number in the series.
1 10 24 43 67 ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What is the riddle which can be asked all day with a different correct answer each time.