Copyright © University of Cambridge. All rights reserved.
'Domino Numbers' printed from http://nrich.maths.org/
Here is a grid which looks a little like spots on dice or dominoes:
If you can see this message Flash may not be working in your browser
Please see http://nrich.maths.org/techhelp/#flash to enable it.
Full Screen Version
Can you see why 2 by 2 is 5?
What is 2 by 3? You may like to use the interactivity above to explore.
2 by 4?
2 by 5?
Can you predict what 2 by 10 will be? Explain how you know.
What is 3 by 2?
3 by 3?
3 by 4?
Predict what 3 by 10 will be and explain how you arrived at your solution.
How about 10 by 2?
10 by 3?
10 by 10?