What's the best place to go shopping in the ocean?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

If you say my name, I will no longer exist. What am I?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

What work can one never finish?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

How many times can you subtract the number 5 from 25?

Can you find out who is the kidnapper in below Picture and why, Explain ?