Working systematically

Can you set the logic gates so that this machine can decide how many bulbs have been switched on?

Can you use the clues to complete these 5 by 5 Mathematical Sudokus?

Can you use the clues to complete these 4 by 4 Mathematical Sudokus?

Could Ben have any amount of money between 5p and £2 in his pocket if he has five coins?

Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.

Find the values of the nine letters in the sum: FOOT + BALL = GAME

Investigate the different ways that fifteen schools could have given money in a charity fundraiser.

This task challenges you to create symmetrical U shapes out of rods and find their areas.

How many different rectangles can you make using this set of rods?