Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?
What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?
Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?
The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?
Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?
Who always enjoys poor health?
You need to arrange three 7 and mathematical symbols to form number 1?
A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open 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?
I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?
I have branches, but no fruit, trunk or leaves. What am I?
In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.