Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?

How would you create the largest possible two-digit even number from the digit I've given you and one of your choice?

This is a game in which your counters move in a spiral round the snail's shell. It is about understanding tens and units.

You have a set of the digits from 0 – 9. Can you arrange these in the five boxes to make two-digit numbers as close to the targets as possible?

Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

If you put three beads onto a tens/ones abacus you could make the numbers 3, 30, 12 or 21. What numbers can be made with six beads?

Try out this number trick. What happens with different starting numbers? What do you notice?