Question

the LCM of a and 18 is 36, and the HCF of a and 18 is 2, then find a
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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:

$we \: have \: formula \: \\ product\: of \: no \: = hcf \: \times lcm \\ a \times 18 = 2 \times 36 \\ a = \frac{72}{18} \\ a = 4$

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