Can you count the number of matches in the picture below ?

You need to arrange three 7 and mathematical symbols to form number 1?

If your uncle’s sister is not your aunt, what relation is she to you?

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.

I have an eye but still cannot see.

Who am I?

A woman lives in a Tall building thirty-six floors high and 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 series

12, 20, 40, 72, 116, 172 ?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99