How are Hebrew and Greek number methods described in the material?

• A. Less well known but can be read today; use letters of the alphabet, in order, for digits 1-9, tens 10-90 and hundreds 100-900.
• B. More common in modern math.
• C. Based on Arabic numerals.
• D. Not used historically.

Answer: (A)

Hebrew and Greek numeral systems assign numerical values to letters of their alphabets. Each letter stands for a number, and numbers are formed by using letters in groups: the first set covers 1 through 9, the next set covers 10 through 90, and the final set covers 100 through 900. So you read a number by translating the letters back to their values. These systems are historical and not commonly used today, but they are readable if you map the letters to their numbers. That matches the description of being less well known yet readable today and using letters in order for digits 1–9, tens 10–90, and hundreds 100–900.