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 5 boxes to make two-digit numbers as close to the targets as possible?
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?
One of Thirty-six
Age 5 to 7 Challenge Level:
Can you find the chosen number from the grid using the clues?
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?
Grouping Goodies
Age 5 to 7 Challenge Level:
Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?
That Number Square!
Age 5 to 11 Challenge Level:
How quickly can you put back the numbers on the hundred square? What's the smartest way to do it?
Snail One Hundred
Age 5 to 11 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.
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.