To make the challenge especially stimulating for the brain, there’s a time limit; see if you can decipher all of the “odd ones out” in just 15 seconds. If you succeed, you can count yourself among the upper echelons of highly observant folk!

Solving riddles and picture puzzles is a fun way to give your brain the daily exercise it needs. That is why we have prepared another brainteaser that you can enjoy with your friends and family.

Are you ready for this tricky challenge The photograph?