有年龄各不相同的四个女孩和两个男孩.最大的13岁,最小的7岁,最大的女孩比最小的男孩大4岁,最大的男孩比最小的女孩大4岁,问最大的男孩几岁?
若最小的是男孩7岁,则最大的女孩11岁,那么最大的男孩13岁,最小的女孩9岁.因为有4个女孩,年龄各不相同,而9、10、11只能是三个女孩的年龄.与题不符.
所以最小的应该是女孩,年龄7岁,最大的男孩比最小的女孩大4岁,所以,最大的男孩有11岁.
英语数学题（要算式）there are four girls and two boys at different age
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