Question

Least no. I divisible it by 6,9,15,20

Answer 1

lcm of 6,9,15,60 will be 180

as 180/6=30

180/9=20

180/15=12

180/20=9

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Answer 2

find the HCF of the numbers

6 = 2 x 3

9 = 3 x 3

15 = 3 x 5

20 = 2 x 2 x 5

HCF = 2^2 x 3^2 x 5 = 180

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