Question

Which of the following quantified statement is true?

Options

• The square of every real number is positive.

• There exists a real number whose square is negative.

• There exists a real number whose square is not positive.

• Every real number is rational.

Answer 1

There exists a real number whose square is not positive.

Explanation:

Option (There exists a real number whose square is not positive) is the correct answer since there exists a real number x = 0, such that x² = 0. Zero is neither positive nor negative.