College Math CLEP Prep Practice Exam 2026 - Free College Math CLEP Practice Questions and Study Guide

Real numbers are defined as numbers that can be expressed as infinite decimal representation.

This includes numbers such as whole numbers, natural numbers, integers, fractions, and decimal numbers.

Option A is the only real number listed as it is a whole number, and whole numbers are a subset of real numbers.

Option B, Imaginary, is not a real number as it cannot be represented on the number line and does not follow the rules of real numbers.

Option D, square root of -1, is known as an imaginary number, and as mentioned before, is not a real number since it cannot be represented on the number line.