Which is the smallest number that you can write using all the vowels exactly once?

I cannot talk, but I always reply when spoken to. What am I?

Identify the hidden meaning behind this picture?

How many sides does a circle have?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

There is something which you can be arrested for attempting but not for successfully completing.

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 have one eye but still cannot see?