Only two per cent of people can solve this seemingly complex mathematics problem - but once you understand it, you will see it's actually really easy ... answer the final question, 19 + 21 ...

If you happen to be among those who get joy from tackling maths-related puzzles, we have a brain teaser for you. In this ...

A simple brainteaser has been shared online and it asks you to answer a few easy maths questions - which can tell you secrets ...