Q. The product of two numbers is 216. If the HCF is 6, then their LCM is :
Answer: 36
Notes: Let the numbers be 6x and 6y where x and y are prime to each other.
$latex \therefore 6x \times 6y = 216$
$latex => xy = \frac{216}{6\times 6} = 6&s=1$
$latex \therefore LCM = 6xy = 6 \times 6 = 36$
Hence option [C] is the right answer.