It looks like a simple math sum but has left people scratching their heads... can you solve it?

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

Only 1% with Hawk-eye vision can spot the hidden number in this 3D optical illusion!

Think you have hawk eyes? Then find the hidden number expertly placed in this 3D optical illusion rug image in 7 seconds. Only 1% with hawk-eye vision and intelligence can do so. Are you one of those ...