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Railways PYQCBT 2 2017

RRB NTPC · Question 113

______ is an irrational number.

  1. √(2 × 3)

  2. √9

  3. \(\dfrac{2}{3}\)

  4. \(\dfrac{11}{8}\)

Show answer & explanation

Answer: (A) √(2 × 3)

Explanation

√(2 × 3) = √6 is not a perfect square, so it is irrational. √9 = 3, 2/3 and 11/8 are rational.