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Q.

The H.C.F of $10, 20, 30$ is

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a

10

b

2

c

5

d

8

answer is D.

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Detailed Solution

Factors of 10 = 1,2,5,10

Factors of 20 = 1,2,4,5,10,20

Factors of 30 = 1,2,3,5,6,10,15,30

Common factor of $10, 20, 30$ are 1,2,5,10

HCF of $10, 20, 30$ is 10.

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