This maths puzzle has been leaving people confused.

How good are you at maths? Some of us will readily admit it's not our strongest subject, but others amongst us relish the thought of solving a complex equation or who can work out percentages in their head in seconds. No matter what your skill level when it comes to maths, keeping your brain active by solving puzzles and brain teasers is vital for cognitive health, and maths questions are a great way to achieve that.