国家对河北雄县规划:如果你能回答,大哥, 我相当崇拜你!

A princess is as old as the prince will be when the princess is twice as old as the prince was when the princess's age was half the sum of their present age.

公主现在的年龄与王子将来当公主的年龄是王子过去当公主当时的年龄是公主和王子现在年龄之和的一半的时候年龄的两倍的时候的年龄相同。

也可以翻译（意译）成：

过去的某一年，公主的年龄是现在公主和王子年龄之和的一半。将来的某一年，公主的年龄将是在过去那一年王子年龄的两倍。现在，公主的年龄同将来那一年王子的年龄相同。

解答：
公主现在x岁，王子y岁。过去距现在n年，将来距现在m年。则：
x=y+m
x+m=2*(y-n)
x-n=(x+y)/2

得：
y=3x/4
m=x/4
n=x/8

所以：x=8 y=6 n=1 m=2
x=16 y=12 n=2 m=4
x=24 y=18 n=3 m=6
.....
x=8*s y=6*s n=s m=2*s (s=1,2,3,4,....)

如果是一个妈生的，
那就应该是twins

垃圾句子！

A Princess is as old as the Prince will be when the Princess is twice as old as the Prince was when the Princess' age was half the sum of their present age.
设想计算后的结果
1. The Prince is 20 and the Princess is 30

2. The Prince is 40 and the Princess is 30

3. The Prince is 30 and the Princess is 40

4. The Prince is 30 and the Princess is 20

结论： They are both the same age. 他们是同年人。（不一定能说是twins哦！！！）。

老兄我见过这题，是Brain teasers 脑筋急转弯

你漏了最关键的最后一句， If the princess is 40, how old is the prince?

应该是prince也是40岁

没有题目的问题

缺乏一定因素，能否补全？