Q. 34

The number of common prime factors of 75, 60, and 105 is
A. 2

B. 3

C. 4

D. 5

Answer :

Prime factors of 75 = 3, 5


Prime factors of 60 = 2, 3, 5


Prime factors of 105 = 3, 5, 7


Hence, common prime factors are 3 and 5


I.e. count = 2

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