Brain teasers are puzzles that test how well you can think, observe, and solve problems. They are not always about maths- sometimes, they need you to focus and think in a smart way. These puzzles are ...

"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 ...

Sharpen your concentration with this hidden object brain teaser. Search the scene carefully and locate the bone before the timer ends.