[求助]读题不懂 请教

katherine8110

if n is a positive integer and n² is divisible by 72, then the largest positive integer that must divide n is?

A 6, B 12, C 24, D 36, E 48

读的死去活来，很容易得到N最小为12，实在不理解then the largest positive integer that must divide n is是什么意思

答案为C

憨憨

我觉得是不是答案错啊？ the largest positive integer that must divide n is就是能整除n的最大正整数啊，那就应该找n2最小值，最小值是当n=12时，n2=144，所以这个最大正整数为12，怎么得出24呢？？？

katherine8110

谢谢！ 我也觉的答案错了.