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Railways PYQCBT 2 2017

RRB NTPC · Question 57

Arrange the numbers in descending order: 2√11, 4√3, 3√5, 5√2

  1. 5√2, 4√3, 3√5, 2√11

  2. 3√5, 4√3, 5√2, 2√11

  3. 2√11, 4√ 3, 3√5, 5√2

  4. 4√3, 3√5, 2√11, 5√2

Show answer & explanation

Answer: (A) 5√2, 4√3, 3√5, 2√11

Explanation

As square roots: 2√11 = √44, 4√3 = √48, 3√5 = √45 and 5√2 = √50. Descending: √50, √48, √45, √44, i.e. 5√2, 4√3, 3√5, 2√11.