A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What is the next number in the series?

15 29 56 108 208 ?

Rearrange the letters in "new door" to make one word.

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

What happened when the wheel was invented?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What is more useful when it is broken?

I have branches, but no fruit, trunk or leaves. What am I?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.