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Railways PYQCBT 2 2017

RRB NTPC · Question 15

HCF of 12/5, 21/6, 9/4 and 18/3 is:

  1. 1/20

  2. 3/2

  3. 3/5

  4. 3/7

Show answer & explanation

Answer: (A) 1/20

Explanation

HCF of fractions = HCF of numerators ÷ LCM of denominators. HCF(12, 21, 9, 18) = 3 and LCM(5, 6, 4, 3) = 60, so the HCF = 3/60 = 1/20.