An ‘impossible’ Rubik’s cube brainteaser can only be solved in 30 seconds by the most eagle-eyed puzzlers as almost all of the pictures look identical – but there’s a sneaky odd one outAn ‘impossible’ Rubik’s cube brainteaser can only be solved in 30 seconds by the most eagle-eyed puzzlers as almost all of the pictures look identical – but there’s a sneaky odd one out