Find thee ratio between the LCM and HCF of 5,15 and 20.
Let'* find prime factors of 5, 15 & 20
5 = 5
15 = 3 × 5
20 = 2 × 2 × 5
LCM = 5 × 2 × 2 × 3 = 60
HCF = 5
Ratio = LCM/HCF
= 60 / 5
= 12 /1
= 12 : 1
