Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Find the next number in the series

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

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What goes up but never comes down?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

No matter how little or how much you use me, you change me every month. What am I?

The Little ant seems to be always confused. Do you know why?

There was a strange boy who was born before his father. How can this be possible?