It looks like a simple math sum but has left people scratching their heads... can you solve it?

It looks simple at first, but this math problem has the internet stumped. Don't be fooled - it demands more brainpower than ...
BBC

Karate Cats - KS1 Maths

The elite team of Karate Cats have completed their training and are now ready to compete to be maths champions! Join the Karate Cats and improve your KS1 maths skills. Earn the bronze, silver and gold ...