QA – Placement Quizzes | HCF | Question 9

Three numbers are in the ratio 1:2:3 and their HCF is 12. The numbers are:
(A) 4, 8, 12
(B) 5, 10, 15
(C) 10, 20, 30
(D) 12, 24, 36


Answer: (D)

Explanation: Given ratios are 1:2:3

Let the three numbers be x, 2x and 3x, when we find HCF of x, 2x and 3x we get x because 1, 2, 3 are primes.
Also given HCF is 12

x = 12 

So other numbers are 2x = 24 and 3x = 36.

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