RRB RPF RPSF SI and CONS Model Papers 6 with solutions

(2) In Binary number system, 111 represents seven. In mathematics and digital electronics, a binary number is a number that is expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically 0 (zero) and 1 (one). The base-2 numeral system is a positional notation with a radix of 2.
Each digit is referred to as a bit.
Other number systems include octal, decimal, hexadecimal etc.