Question

If LCM (a, 18) = 36 and HCF (a, 18) = 2, then a is equal to –

Answer 1

Answer:

Given that,

LCM (a, 18) is 36 and HCF (a,18) is 2.

One of the numbers is known to us as 18.

So, by applying the formula:

LCM × HCF = a × 18

36 × 2 = a × 18

72 = 18(a)

18a = 72

a = 72/18 = 4.

Hence, the value of a is 4.

Answer 2

Answer:

$a = 4$

Step-by-step explanation:

HCF(a,18)=2 and LCM(a,18)=36

The formula between a HCF, LCM and the product of the two numbers is -

$a \times 18 = HCF(a,18) \times LCM(a,18)\\18.a= 36 \times 2\\a = 4$