One brain teaser that's currently stumping people involves fixing the equation shown below by making a small adjustment. This ...

"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 ...

Brain teaser detective riddles test your deduction skills to see if you are as sharp as Sherlock Holmes! You are required to look at the picture carefully and spot the clues hiding in plain sight.

Are you ready to test your observation skills? In today’s puzzle series, you can see an inverted 49-number series. With this Optical illusion, it will be a test of your vision, and within 7 seconds, ...