What type of real number is \(\sqrt{16}\)?
Answer and explanation
Correct answer: Rational number
Since \(16\) is a perfect square, \(\sqrt{16}=4\). The number \(4\) can be written as \(\frac{4}{1}\), so it is rational. Therefore, option B is correct. It is not irrational because its value is an exact integer, and it is certainly a real, defined number. Exam tip: the square root of a positive perfect square is an integer and hence rational.
Frequently asked questions
What is the correct answer to this question?
Rational number
Why is this the correct answer?
Since \(16\) is a perfect square, \(\sqrt{16}=4\). The number \(4\) can be written as \(\frac{4}{1}\), so it is rational. Therefore, option B is correct. It is not irrational because its value is an exact integer, and it is certainly a real, defined number. Exam tip: the square root of a positive perfect square is an integer and hence rational.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Rational numbers.
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