The more of this there is, the less you see. What is it?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I am sure no one can have two things for dinner. what are they?

Can you count the number of lines in the below picture?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

What is the centre of gravity?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Why do Chinese men eat more rice than Japanese men do ?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?