sally likes 245 but not 244,she likes 900 but not 800,she likes 144 but not 145

题目

sally likes 245 but not 244,she likes 900 but not 800,she likes 144 but not 145
which number she will like below?
A 1600 B.1500 C.2100 D.1800
我要知道为什么,

答案

sally likes 245 but not 244,可看出,sally喜欢的数可被5整除.she likes 900 but not 800,可看出,sally喜欢的数是一个完全平方数.she likes 144 but not 145,可看出,sally喜欢的数可被8整除.满足此三条件的只有A....