Q. 55.0( 1 Vote )

# Which one of the following is not true?A. Every natural number is a rational numberB. Every real number is a rational numberC. Every whole number is a rational numberD. Every integer is a rational number.

Real numbers is the set which includes both rational and irrational numbers.

Rational numbers and Irrational numbers are 2 independent subsets of Real numbers. Hence every real number is not a rational number (since real numbers also consists of irrational numbers.)

Option (A) is correct because every natural number can be expressed in form (q≠0 i.e a rational number).

Option (C) is correct because every whole number can be expressed in form (q≠0 i.e a rational number).

Option (D) is correct because every integer can be expressed in form (q≠0 i.e a rational number).

Natural numbers Whole numbers Integers Rational Numbers Real numbers

Real numbers (Rational numbers + Irrational numbers).

Hence, only option B is incorrect.

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