both n and k are positive.
dividing (1) by K, we get n/k = 3 + 3/k. Not sufficient enough to answer what the reminder is. So throw out choices A and D
with (2), we only know the value of k, so can't find out what the remainder is. So throw out choice B.
The 2 statements toegther give us n = (5+1)3 = 18 and k = 5. We can definitely say what the remainder is with the 2 statements together. So my pick Choice C
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