[求助]问两道ｐｒｅｐ的数学。快考试了。谢谢

jessica_rm

１、What is the remainder when the positive integer n is divided by the positive integer k, where k >1 ?

(1) n=(k+1)^3

(2) k=5

answer: A

我觉得应该选C啊。。。恳请nn解释一下

2   Is the hundredths digit of the decimal d greater than 5 ?

(1) The tenths digit of 10d is 7

(2) The thousandths digit of d/10 is 7

answer: D

这道题的整个题意和选项，我都没怎么明白。。。。求助！

jessica_rm

谢谢楼上mm·～  真好～

第一个懂了！　

第二个就是说那个百位数就是７，对吧？