Challenge Level

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

Challenge Level

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

Challenge Level

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

Challenge Level

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

Challenge Level

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?

Challenge Level

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

Challenge Level

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