Contrary to their name, it wasn’t the Arabs that came up with these numbers. Rather, it was the Indians! In Europe, Roman numerals were used until up to the Middles Ages. So to write 138, you essentially had to write 100+10+10+10+5+1+1+1, i.e. CXXXVIII. With this system, arithmatic operations were inevitably extremely complicated. At the same […]

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