Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What does this mathematical rebus means ?

I travel all around the world but always stay in the corner. What am I?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Why blonde cannot dial 911?

What is harder to catch the faster you run?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

What came first, the chicken or the egg?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?