Q2. The ratio between the LCM and
HCF of 5, 15, 20 is:(a) 9: 1 (b) 4:3 (c)
11:1 (d) 12:1
a​

2 thoughts on “Q2. The ratio between the LCM and<br />HCF of 5, 15, 20 is:(a) 9: 1 (b) 4:3 (c)<br />11:1 (d) 12:1<br />a​”

1. Answer:

   D)12:1

   HCF = 5

   LCM = 60

   Therefore Ratio 12:1

   Reply

2. given : 5,15,20

   to find : the ratio between the LCM and HCF of 5,15,20

   solution :

   1. the LCM of 5,15,20 is

   • 5 = 5
   • 15 = 3×5
   • 20 =2×2×5
   • LCM { 5,15,20} = 2×2×3×5 = 60

   2. the HCF of the given number is 5

   • LCM : HCF = 60 : 5

   =12 : 1

   option D is correct .

   Reply