Tricky brainteaser challenges you to spot 16 tigers hidden in image in just 21 seconds; If you wanted to discover whether you have a high IQ, then give this tricky optical illusion a go -you're undeniably a total whizz if you can solve the answer within 21 seconds

Byline: By, Christine Younan & Grace Hoffman If you've always contemplated whether or not you have a high IQ, then a new optical illusion may provide the answer as it's [...]