We looked again at this answer to the "Zero means nothing" question:
We talked about it's two uses, on it's own to represent nothing, and with other numbers, as a place holder.
We also had a look at the first half of this video about the history of zero (the second half gets a bit complicated, so we didn't watch that):
So, in that fort in Gwalior, India, is the oldest zero in the world.
|The number 270 is circled|