It’s time to put your brain to the test! These riddles are some of the hardest you’ll find anywhere online - with a 99% fail rate, they’re designed to stump even the sharpest minds. Think you’ve got ...

The teaser in question comes from X (formerly Twitter) user Ganesh UOR, who is known for regularly sharing thought-provoking brain teasers. The puzzle reads: "Brain test: Divide 90 by half and then ...