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It was first invented in the 4th century BC. By 525 AD, Dionysius Exiguus was using Roman numerals to calculate the birth of Christ and formulate the AD era (now known as the Common Era, or CE). He also used N (nulla, latin for none) for the value zero, as did Bebe in 731 when the AD era finally became dominant. Roman numerals were in common use until the 14th century, when they were largely replaced by the Hindu-Arabic numerals that had been introduced in the 10th century.

In ancient Rome, in the Middle Ages (5th Century AD to 16th Century AD)

Thought to have been adapted from the Etruscan numerals.

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7y ago
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Q: When were Roman numerals invented?
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