A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

I always drive my customer away.

Who am I?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

What kind of band never plays music?

What is the fastest way to double your money?

Why Wine Glass Stem is so long?

What can go up a chimney down, but can’t go down a chimney up?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

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

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10