An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

What English word has three consecutive double letters?

what's the probability of getting a king or a queen from a pack of 52 cards?

How many words can a pen with half refill write?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Keyboard words are not in alphabetical order, Why?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"