Add Yahoo as a preferred source to see more of our stories on Google. A variation of a puzzle called the “pick-up sticks problem” asks the following question: If I have some number of sticks with ...

A drawer contains 12 identical black socks and 12 identical white socks. If you pick two socks at random, what is the probability of getting a matching pair? That was ...

There are 36 cards labeled with the numbers 1 through 36 and then placed face down on a table. If four cards are revealed one after the other, what is the probability that each card’s number is larger ...