Ask the publishers to restore access to 500,000+ books. An icon used to represent a menu that can be toggled by interacting with this icon. A line drawing of the Internet Archive headquarters building ...

Think you’re smart enough? This brain teaser stumps most, but high IQs above 130 can solve it in 9 seconds. Are you ready for ...

A maths problem (pictured has been going viral online, with people arguing over what the correct result should be.