Are math problems bugging your kids? Tell them to talk back -- using their hands. Psychologists report that gesturing can help kids add new and correct problem-solving strategies to their ...

67 + 9 = ? Can you solve the grade-school problem in under 60 seconds? At first glance, the equations don't seem to follow normal mathematical rules. Users shared their responses in the comments.

A basic-looking math puzzle is going viral for a very unexpected reason: the answers seem totally wrong - until you crack the hidden pattern.