Brits have been left baffled over a tricky brainteaser that needs to be solved in just 58 seconds to prove you have the ‘sharpest eyes’ – but one in five people give up completely before cracking the puzzleBrits have been left baffled over a tricky brainteaser that needs to be solved in just 58 seconds to prove you have the ‘sharpest eyes’ – but one in five people give up completely before cracking the puzzle