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Quantitative Aptitude

HCF and LCM

HCF of two nu...

Question

HCF of two numbers is 6 and their product is 432. How many pairs of such numbers exist?

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is B 2
Let the numbers be 6x & 6y such that x & y are coprime to each other
$6 x \times 6 y = 432$
xy =12
Possible pairs are $(1 \times 12)$ & $(3 \times 4)$
So, two pairs of numbers exist.

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