Question

HCF of two numbers is 27 and their LCM is 162. If one of the number is 54 then find the other.

Answer 1

Use this rule
LCMxHCF=product of numbers
Let the reqd no be x
27x62=54(x)
x=31

Answer 2

HCF =27
LCM=162
And one number is 54
LCM X HCF=1st no. X 2nd no.
then
let 2nd no. be x
so.
$so \\ 27 \times 162 = 54 \times x \\ \frac{27 \times 162}{54} = x \\ \frac{1 \times 81}{1} = x \\ therefore \: the \: 2nd \: no. \: = x \: which \: is \: 81$