"A puzzle is a problem to make the user think. They are often used for entertainment and can help logic skills. The user may need to recognise patterns to solve it, so those who have good logic are usually good with puzzles."http://simple.wikipedia.org/wiki/Puzzle For other questions of the 'What is xxx?' style, just use this link:http://simple.wikipedia.org/wiki/xxx but replace xxx with the word you are looking for.