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Question

Which of the following numbers is not an irrational number?

This question was previously asked in
RRB Group D 2018 Question Paper (11-Oct-2018) (Shift 3)
The correct answer is

\(\sqrt{6084}\)

A square root is rational only when the number under it is a perfect square. π is a well-known irrational constant.

Check: \(78^{2} = 6084\), so \(\sqrt{6084} = 78\), a rational integer. 7652 and 5428 are not perfect squares, so their roots are irrational.

The number that is not irrational is \(\sqrt{6084}\).

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Important Questions from Rational or Irrational Numbers

  1. Which of the following number is irrational?

  2. Which of the following numbers will have an irrational square root?

  3. What is the square root of 16 + 6√7?

  4. A non-terminating but recurring decimal is:

  5. Give the expression of   \(8.\overline{48}\)

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