Question

Find the ratio between HCF and LCM of 10, 15 and 20.​

Answer 1

Answer is 1:12

Step-by-step explanation:

Factors of 10 are 1,2,5 and 10

Factors of 15 are 1,3,5 and 15

Factors of 20 are 1,2,4,5,10 and 20

So HCF of 10, 15 and 20 is 5.

LCM of 10, 15 and 20 is 60.

5:60 = 1:12

Answer 2

Let's find prime factors of 10, 15 & 20

10 = 5 ×2

15 = 3 × 5

20 = 2 × 2 × 5

LCM = 60

HCF = 5

Ratio = LCM/HCF

= 60/ 5

= 12