This article for the young and old talks about the origins of our number system and the important role zero has to play in it.
How would you count the number of fingers in these pictures?
Well now, what would happen if we lost all the nines in our number
system? Have a go at writing the numbers out in this way and have a
look at the multiplications table.
A collection of games on the NIM theme
Here are many ideas for you to investigate - all linked with the
Investigate the different ways these aliens count in this
challenge. You could start by thinking about how each of them would
write our number 7.