作业帮 > 英语 > 作业

Bill,George,Sally and Ann are brothers and sisters ,One of t

来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/15 11:50:31
Bill,George,Sally and Ann are brothers and sisters ,One of them is 15,one is 12.One of the boys is 13,and one of the girls is 14,Bill is older than Sally but Ann isn't.How old are they?
Bill is George is Sally is Ann is
Bill 15 George 13 Sally 14 Ann 12
已知他们本别是15、14、13、12岁.
Bill、George中必有一个是13岁,Sally、 Ann 中必有一个是14岁（One of the boys is 13,and one of the girls is 14）.
Bill比Sally大,Sally比Ann大（Bill is older than Sally but Ann isn't）
根据“Sally、 Ann 中必有一个是14岁”的条件,假设Ann是14岁,由于Sally比Ann大,那么Sally只能是15岁.由于Bill比Sally大,那么Bill的岁数大于15,不符合12、13、14、15岁的条件.所以无解.
又假设Sally是14岁,由于Bill比Sally大,所以Bill只能是15岁,那么George就是13岁.Ann12岁,也满足"Sally的岁数大于等于Ann的岁数"的条件.
当然,你也可以根据BOYS的年龄条件作假设求解.答案是一样的.
Bill,George,Sally and Ann are brothers and sisters ,One of t 1.Bill,George,Sally and Ann are brothers and sisters.I know Bill,George,Sally and Ann are brothers and sisters.I know th 阅读短文短文Jack,Dick,Ann and Kate are brothers and sisters.Idon't 英译汉：brothers and sisters are close as 6 Brothers and Sisters Brothers and Sisters 歌词 Ken you and Bill are my brothers Brothers and sisters are as closeas hands and feet.是什么意思 英语翻译Dear Brothers and Sisters,If you are under the age of 18 I'm Peter Penguin.I have many brothers and sisters.Most of t brothers and sisters 第四季