Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?

What will you call your mother's brother's brother-in-law?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There is a place where if I stand up straight, I will still be considered sideways.

I have teeth but i don't bite. Who Am I ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?