Question

Which of the following is not a positional number system?

(a) Roman Number System

(b) Octal Number System

(c) Binary Number System

(d) Hexadecimal Number System

The question was posed to me in an online quiz.

This interesting question is from The Binary Number System in division Number Systems of Computer Fundamentals

Answer 1

Correct option is (a) Roman Number System

Explanation: The Roman number system isn’t a positional number system since it uses symbols to represent numbers.

The octal number system uses digits from 0-7, the binary number system uses digits from 0-1 whereas, the hexadecimal number system uses digits from 0-15.