Instead of placing a decimal after the units, such as in “13.25” in the decimal system, society members distinguish their numbers with a semicolon, such as “13;25.” A member writes twelve as 10, ...

Humans, for the most part, count in chunks of 10 — that’s the foundation of the decimal system. Despite its near-universal adoption, however, it’s a completely arbitrary numbering system that emerged ...

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While adding up your grocery bill in the supermarket, you’re probably not thinking how important or sophisticated our number system is. But the discovery of the present system, by unknown ...