10+10 and 11+11 can give you the same answer.

Explain how?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

A woman who works in a sweet shop has a measurement of 32-26-36, is 5"4" tall, and wears size "6" shoes. What do you think she weighs?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

There is a place where if I stand up straight, I will still be considered sideways.

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Can you find out the number that should replace the question mark with a valid reason?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

How can a man go eight days without sleep?