Which system uses letters of the alphabet to represent digits for units, tens, and hundreds?

Which system uses letters of the alphabet to represent digits for units, tens, and hundreds?

• A. Hebrew and Greek number methods
• B. Roman numerals
• C. Quipu
• D. Arabic numerals

Answer: (A)

Alphabetic numeral systems assign numeric values to letters of the alphabet, with different letters standing for units, tens, and hundreds. In Hebrew and Greek numerals, the same idea is used: one set of letters represents 1–9, another set represents 10–90, and a third set represents 100–900, so a number is written by combining letters for the appropriate units, tens, and hundreds. That’s why these systems use letters to represent digits across the place values. Roman numerals also use letters, but they don’t map one-to-one to digit positions in a straightforward way for each place value, and Quipu uses knots while Arabic numerals use digits rather than letters.

Alphabetic numeral systems assign numeric values to letters of the alphabet, with different letters standing for units, tens, and hundreds. In Hebrew and Greek numerals, the same idea is used: one set of letters represents 1–9, another set represents 10–90, and a third set represents 100–900, so a number is written by combining letters for the appropriate units, tens, and hundreds. That’s why these systems use letters to represent digits across the place values.

Roman numerals also use letters, but they don’t map one-to-one to digit positions in a straightforward way for each place value, and Quipu uses knots while Arabic numerals use digits rather than letters.