Question

Which of the following is a which of the following is a rational number?

A. The square root of 24
B. The square root of 123
C. The square root of 20
D. Pi

Answer 1

A. √25

General Formulas and Concepts:

Math

• Rational Numbers - numbers that can be written as integers, terminating decimals, or fractions
• Irrational Numbers - numbers that have non-terminating decimals i.e infinite decimals and cannot be written into a fraction

Explanation:

Step 1: Define

A. √25

B. √123

C. √20

D. π

Step 2: Identify

A. √25 = 5; Rational

B. √123 ≈ 11.0905...; Irrational

C. √20 = 2√5 ≈ 4.47214...; Irrational

D. π ≈ 3.1415926535897932384626433832795...; Irrational

Therefore, our answer choice is A.