In 10 years the ages of two brothers and two sisters will total How much will their ages total in 7 years?

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问题 In 10 years the ages of two brothers and two sisters will total How much will their ages total in 7 years?

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答案88 years

解析 (共有4个人，每年的年龄增长总数为4，3年的年龄增长总数为12。100—12=88。)

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