The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

When 99 is considered higher than 100?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

What has lots of eyes, but can’t see?

The more of this there is, the less you see. What is it?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

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?

Can you write down eight eights so that they add up to one thousand?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?