Why are all black people so quick ?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

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

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

How many times in a given day, minutes and hour clock comes in a straight line ?

What does below Rebus say?

XLR8

Can you find out the remainder when 3^300 is divided by 5?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?