Question

the LCM of two numbers is 2295 and their HCF is 9. if one number is 153 find the other number.

Answer 1

First multiply the LCM and the HCF and then divide the result by the number i.e. 153 
So you get 135
LCM*HCF=NO.1*NO.2

Answer 2

we know product of two nos=product of LCM and HCF
hence, let one no be x and rest all given in question. so, x*153=2295*9
x=135
so, the other no is 135