Sally likes 225 but not 224; she likes 900 but not 800; she likes 144 but not 145.Which does she lik

题目

Sally likes 225 but not 224; she likes 900 but not 800; she likes 144 but not 145.Which does she like:
A) 1500 B) 1600 C) 1700 D) 1800
正确答案是选B.

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B.这...