Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What has many teeth, but cannot bite?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

Why do you find that most of the buildings are deprived of the 13th floor?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

What jumps when it walks and sits when it stands?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?