求一道题

还有Find a median of n consecutive even integers (1) Median is a ratio of the remaining sum of integers (2) the sum of remaining integers excluding median is a figure

由条件1可知：me=1/3(av*n-me) 虽然av知道了但是n还是未知，所以me还是无法求出

加上条件2：av*n-me=256，联合条件一就可求出me

答案 C

题目也没看懂， 求助

n是整数，问n被15除的余数r=？

条件1：n除5余4

条件2：n除6余5

答案: C