Which of the following is a binary number ?

1. 16

2. 8

3. 10

4. 0

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0

A binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: “0” and “1”. Each digit, or bit, in a binary number, represents a power of 2, with the rightmost bit representing 2^0 and each bit moving left representing the next power of 2. For example, the binary number “1010” represents the decimal number 10, which is equal to (1 x 2^3) + (0 x 2^2) + (1 x 2^1) + (0 x 2^0). Binary numbers are used in digital electronics and computer systems to represent data and perform calculations.

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