October 2000
Intermediate to advanced
400 pages
13h 30m
English
Ten is an exceptionally important number to us humans. Ten is the number of fingers and toes most of us have, and we certainly prefer to have all ten of each. Because our fingers are convenient for counting, we humans have adapted an entire number system that’s based on the number 10.

As I mentioned in the previous chapter, the number system that we use is called base ten, or decimal. The number system seems so natural to us that it’s difficult at first to conceive of alternatives. Indeed, when we see the number 10 we can’t help but think that this number refers to this many ducks:
But the only reason that the number ...
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