Question

If the LCM of a and 18 is 36 and the HCF of a and 18 is 2, then a = 

Options

• 2

• 3

• 4

• 1

Answer 1

LCM `(a,18)=36`

HCF `(a18,)=2`

We know that the product of numbers is equal to the product of their HCF and LCM.

`18 a=2(36)`

`a= (2(36))/18`

`a=4`
Hence the correct choice is (c).