Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

How can one talk without saying a single word?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

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

I have an eye but still cannot see.

Who am I?

What part of the chicken has the most feathers?

If 1+9+8=1, what is 2+8+9?

I look at you, you look at me I raise my right, you raise your left. What am I?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?