Question

how do you know that 2 is not a common factor of 53 and 58?​

Answer 1

Answer:

Because only 58 is divisible by 2 not 53.

so, 2 is not common factor of 53 and 58

Answer 2

Answer:

because 53 isn't divisible by 2 I.e. 2 isn't the factor of 53.

therefore, 2 isn't the common factor of 53 and 58.