Question

the number of common prime factors of 60 , 75 and 105 is-
a) 2
B) 3
C) 4
d) 5

please help me how to do it.....​

Answer 1

Answer:

5

Step-by-step explanation:

5 will be common factor among all these given numbers

Answer 2

Prime factors of,

75 = 3 × 5 × 5

60 = 2 × 2 × 3 × 5

105 = 3 × 5 × 7

So, common prime factors in the given three numbers are 3 and 5. Therefore, the number of common prime factors of 60 ,75 and 105 is 2