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​

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. 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 .

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