Think you've got what it takes to solve some seriously tricky riddles? We've got a video packed with brain-busting riddles ...

Optical illusions test your visual acuity and depth perception skills. Only 1% with eagle eyes can find the word SEA in the word grid in 5 seconds. Do you have that rare skill? Find out now!

It looks simple at first, but this math problem has the internet stumped. Don't be fooled - it demands more brainpower than ...

Some say the reason most manhole covers are round is that a circle cannot fall through a smaller circular hole. Which of ...