This interactive quiz is suitable for GCSE maths students studying real-life graphs, distance-time and displacement-time graphs, speed-time and velocity-time graphs.

The king tells Pythagoras he wants to make wooden bridges to cross the moat during the night. Pythagoras estimates the distance using his clever maths and reports that the moat is 10m wide.

Enter the BBC Radio 4 podcast Uncharted, here to show you how numbers, graphs, maths and data plotting can be pivotal, the secret sauce behind some of the biggest scandals, historical watersheds ...