Question

what is real number.

Answer 1

In mathematics, a real number is a value of a continuous quantity that can represent a distance along a line. ... The real numbers include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers, such as √2 (1.41421356..., the square root of 2, an irrational algebraic number).

Answer 2

set of W, N, Q, Q', Z combination is called real numbers