Question

the hcf ann lcm of two nber are 3 and 90 respectively if one of the numbers is 18 find the other number

Answer 1

HCF×LCM=product
3×90=18×x
270=18x
x=270/18=15

Answer 2

one number=18

other number = ?

hcf =3

lcm=90

18×?=3×90

?=3×90/18

other number is 15