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Sometimes We Lose Things

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.

Nim-like Games

A collection of games on the NIM theme

A Story about Absolutely Nothing

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.

It Must Be 2000

Age 7 to 11
Challenge Level

Why do this problem?

This activity is a good source of ideas for number investigations. It was originally set in the year $2000$ so was particularly appropriate then but of course you could change it to suit the year you are in now.

Key questions

What could you do with this number?
What does it look like to have $2000$ objects, cubes, counters, etc.?