The combined age of Frasier and Niles is 88 years. The combined age of Niles and Daphne is 76 years. The combined age

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问题 The combined age of Frasier and Niles is 88 years.
    The combined age of Niles and Daphne is 76 years.
    The combined age of Frasier and Daphne is 80 years.
    Figure out each person’s age.

选项

答案Frasier 46, Niles 42, Daphne 34.

解析 (根据题意,分别取其名字的第一个大写字母,可以得出如下的方程式:①F+N=88②N+D=76③F+D=80由①-②可以得出④F-D=12由③-④可以得出D等于34,由此可知其他两人的年龄。)  
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