Question

A boy has got the same number of sisters as brothers.But his sister has got half the number 未完接

of sisters as brothers. The number of sisters in this family is __________, and the number of the brothers is _________.请告诉我为什么？谢谢！

Answer 1

three four
也就是说，这个家庭里有4个男孩儿，3个女孩儿。
所以说，其中一个男孩儿，有三个兄弟，三个姐妹，数量相等。
女孩儿则有四个兄弟，两个姐妹，姐妹的数目是兄弟的一半。

Answer 2

three
four

其中任一男孩，有两个兄弟两个姐妹，任一个女孩有四个兄弟两个姐妹