In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically 0 (zero) and 1 (one).

Answer this question based on the passage: binary number system represents values as a sequence of? Okie... think carefully first, then make a decision:
The important part for answering this question is: In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically 0 (zero) and 1 (one). So, the answer is 0 ( zero ) and 1 ( one ).