So, pop your thinking caps on and set a timer - as you have just five seconds to lock in your answer and prove you're a genius. Fail, and you kiss goodbye to your chances of being invited to Mensa.

Discover whether you're a modern day Albert Einstein with this deceptively difficult brainteaser that you need to solve in just eight seconds or less. And no, we can't give away any clues on this ...

But when it comes to brain teasers that involve maths, the mood completely shifts. (Also read: Brain teaser: If you crack this tricky maths riddle, you’ll earn certified genius status) ...