ONLY the most eagle-eyed will be able to spot the 13 hidden faces in this devilishly difficult optical illusion. Put your vision to the test with this tricky brainteaser, which will have you ...

Blake Lively, Chris Pratt and Keira Knightley are just a few celebrities that have hit the headlines recently, and these famous faces also feature in this month’s quiz. But can you spot which of ...