Can you arrange the numbers 1 to 17 in a row so that each adjacent pair adds up to a square number?

Sissa cleverly asked the King for a reward that sounded quite modest but turned out to be rather large...

Sets of integers like 3, 4, 5 are called Pythagorean Triples, because they could be the lengths of the sides of a right-angled triangle. Can you find any more?

In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

Which of these pocket money systems would you rather have?