How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What country can make you shiver?

What has to be broken before you can use it?

By moving just one matchstick, you need to make the below statement true. Can you do it?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

Who has married many women but was never married?

Solve the alphametic puzzle by replacing the alphabet with the number.

S T O R M +
S O L E S
=========
T O W E L
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what does the below math rebus puzzle mean?