Question

Which sentence is not true about rational numbers? A Integers and fractions are rational numbers. B Whole numbers are rational numbers. C pi is a rational number. D square root of 25 is a rational number.

Answer 1

C)

1) Examining those sentences we have:

A) Integers and fractions are rational numbers. True

Since any integer is a Rational number and fractions are ratios.

B) Whole numbers are rational numbers. True

The whole Number Set is within at Rational Set

C) π is a rational number. False

π is an Irrational number for can't be written as a ratio a/b.

D) square root of 25 is a rational number.​ True

Since √25 = 5 and 5 is a rational number.