There's a new Guinness World Record holder for how fast someone can do math. Aaryan Shukla -- who has been dubbed "the human calculator" can solve complex problems in his head in seconds.

The Rainbow Quiz is a set of audio quizzes for 6-8 year olds, presented by BBC Scotland's Catriona Shearer. They are designed to test number skills, but as it's audio-only, it's also about ...