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AKSHITA GUPTA from ST FRANCIS, INDIRAPURAM

Subject :NCO Class : Class 6

Which of the following numbers are NOT co-prime?
(a) 7 and 15
(b) 30 and 415
(c) 12 and 49
(d) 81 and 16

please explain this question

Ans 1:

AKSHITA GUPTA from ST FRANCIS, INDIRAPURAM

Class : Class 7

Varoon Garg from Nalanda International School, Haryana

Class : Class 7

30 and 415 because they have common factor as 5