A gossiper is someone who talks eagerly and casually about other people. If you like to spread rumors and hear the latest news about your friends, you mig...

For example, researchers may ask participants if they smoke (Filter Question 1), and if yes, if they smoke cigarettes (Filter Question 2a), or if they smo...

A Sudoku puzzle can have more than one solution, but in this case the kind of logical reasoning we described while discussing solving strategies may fall ...

Reoccur and recur are verbs that share a common root word. While they are very close in meaning, they are not the same. Something that is recurring happen...

Rock-paper-scissors, often thought of as a game of random chance, may not be so random after all. According to a study published in Nature and recently re...

From Stamps to Maps There are eight ways to fold a 2 × 2 map along its creases, counting each different vertical sequence of folded panels as a distinct w...

A fair coin generally means that the person is going to give you a probability that coincides with true mathematical formulas. An unfair coin might be one...

Best for mindfulness: The Mindfulness Puzzle Book. Are puzzle books good for your brain?Regular mental exercises, including crosswords, Sudoku, and even b...

On the island of knights and knaves and spies, you are approached by three men. One wears blue, one wears red, and one wears green. You know that one is a...

Go to the Internet Movie Database at imdb.com. This database provides lists of memorable quotes for each movie entry. Type the quote you remember from the...