Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What month of the year has 28 days?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

If eleven plus two equals one, what does nine plus five equal?

John was piloting a plane behind a car but was never able to overtake it. Why?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

I am the fastest animal but cannot climb the tree. What am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

How many times can you subtract the number two from the number fifty?