Q9 of 57 Page 31

If LCM of a and 18 is 36 and HCF of a and 18 is 2, then the value of a will be:

We know the basic following relation:

HCF × LCM = 1st Number × 2nd Number


1st Number = a


2nd Number = 18


36 × 2 = 18 × a


a = 72 / 18


a = 4


So the correct answer is D.

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