Largest Even
Age 5 to 7 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?
Snail One Hundred
Age 5 to 7 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.
Two-digit Targets
Age 5 to 7 Challenge Level:
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?
I Like ...
Age 5 to 7 Challenge Level:
Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?
Light the Lights
Age 5 to 7 Challenge Level:
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?
6 Beads
Age 5 to 7 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?
Digit Additionlive
Age 5 to 11 Challenge Level:
Try out this number trick. What happens with different starting numbers? What do you notice?
You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.
NRICH is part of the family of activities in the Millennium Mathematics Project.