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

What can jump higher than a building?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

How many triangles are there on the puzzle below?

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?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What brings you down but never up?

What is wrong in the below Picture?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?