Keeping up Chyanne’s great idea, here’s this week’s puzzle.
Scroll down for a hint if you’re stuck – but don’t go to the hint before having a good battle with the problem yourself
A little further
Hint: You could start with the first calculation (top left). Try out some different numbers. You’ll find that there is only one possible number for the purple square (remember: all of the shapes represent a number between 0 and 12). Once you know what the purple square represents, you’ll also know the yellow semi-circle – and then work from there.