Answer:
1. 39/13= 3 Since the remainder is zero hence 13 is a factor of 39
2. 342/15 Since the remainder is not zero hence 342 is not a factor of 15.
3. 201/14 Since the remainder is not zero hence 14 is not a factor of 201
4. 228/12= 19 Since the remainder is zero hence 12 is a factor of 228
