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

Explain how?

Rearrange the letters in "new door" to make one word.

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Count the number of lines in the image below ?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

What is the difference between a jeweller and a jailer?

Who is that with a neck and no head, two arms and no hands? What is it?