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Surprisingly, this clunky old Roman number system, with its ancient Greek and Etruscan roots, remained in use in Europe until the thirteenth century!

Our base-10 system derives its power and efficiency from the fact that we use a zero.

To write 3333, which we do by repeating the sign 3 four times, a Roman would have had to scribble down MMMCCCXXXIII—three times as many characters.

And I challenge anyone to multiply this number by MMDCCCLXXIX—using translating these numbers into what they would be in our base-10 number system and then back into Roman numerals).

Our number system is far superior to the old Babylonian base-60 system, because our base is much smaller and because we use a zero, and it is also superior to the 3,000-year-old Greco-Roman-Etruscan letter-based system.

The Cambodian zero proved that zero was an Eastern invention.

But this zero disappeared during the Khmer Rouge regime in Cambodia, and no one knew if it still existed.

I felt very strongly that it was important to recover the world’s oldest zero.

This is because, while the Gwalior zero is concurrent with the Arab empire based in Baghdad (the Caliphate), the zero from 683 predates extensive Arab trading.

It also comes from a location that is much farther east than India.

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