What is meant by binary number what are their bases numbers in ?

Binary nos r set of two nos whivh r 0 and one

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

Binary is a base-2 number system that uses two mutually exclusive states to represent information. A binary number is made up of elements called bits where each bit can be in one of the two possible states. Generally, we represent them with the numerals 1 and 0. We also talk about them being true and false. Electrically, the two states might be represented by high and low voltages or some form of switch turned on or off.