Question

The numbers I, V, X, L, C, D and M are used in which number system?

• A. roman
• B. decimal
• C. octal
• D. hexadecimal

Answer 1

Answer:

A. roman

• Roman number system 

  • The base number in this number system is 7.
  •  The numbers I, V, X, L, C, D and M are used in this numbering system. 
  • Writing a smaller number to the left of a larger number means subtracting from the larger number, and writing a smaller number to the right of a larger number means adding to the larger number.
    • Eg : IV = 4 (5-1), VI = 6 (5 + 1)