Add Yahoo as a preferred source to see more of our stories on Google. Who doesn't love a clever brain teaser puzzle? Also known as rebus puzzles, these visual brain teasers will challenge your wits!

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Researchers at Duke University monitored participants’ brain activity while they completed simple math ...

This brain teaser may look easy at first, but it has a twist. Can you spot the mistake and correct the equation by moving ...

Brain teasers are short, clever puzzles designed to make the mind think in fresh ways. They often look simple, but they push us to use logic, patience, and careful observation. X users found the brain ...

From NATO phonetic to the Greek alphabet, plus historic military codes, Morse Symbols, and other tricky letter systems, there’s something for everyone in this quiz. We’ve created a 26-question ...

Brain Teaser To Test Your IQ: This brain teaser will help in testing your intelligence level based on the decision you make while looking at the problem. This puzzle is a fun way to know your ...

Did you know that IQ tests questions with answers can be a great way to unlock your potential? These tests are packed with logical reasoning questions that can test your ability to identify patterns, ...

Are you smarter than a British spy? Then prove it. GCHQ, one of the UK's spy agencies, is publishing a "Puzzle Book" of riddles and brain-teasers written by British spooks. The puzzles range from ...

Lumosity tops the chart in the educational category for the iPhone and now the "brain-enhancing" app has landed on the iPad. Similar to the iPhone app, the iPad version provides you with a ...

Challenge your mind with quick and fun brain teasers that are simple to start but harder to solve than they look.

hemisphere and the planet's main rings. Click on the image for a larger version. Did you know that Saturn's rings are wavy? Which Mars probe is back in business after it ran into trouble? How many ...