2014 AMC 8 第 10 题

先试着解答 2014 AMC 8 第 10 题,然后核对你的答案与精心整理的解答,解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2014 AMC 8 解答,或核对答案。

所有题目均经美国数学协会(MAA)官方合法授权使用。

10.

第一届 AMC 88 于 19851985 年举行,此后每年举行一次。Samantha 满 1212 岁的那一年参加了第七届 AMC 88。Samantha 出生于哪一年?
The first AMC 88 was given in 19851985 and it has been given annually since that time. Samantha turned 1212 years old the year that she took the seventh AMC 8.8. In what year was Samantha born?
1979 1979
1980 1980
1981 1981
1982 1982
1983 1983
答案:A
知识点:年龄问题日期与时间
小提示:
第七届 AMC 88 比第一届 AMC 88 晚六年
The seventh AMC 88 was six years after the first AMC 8.8.
大提示:
从那一年减去 Samantha 的年龄
Subtract Samantha’s age from that year.
解答:
第七届 AMC 88 是第一届之后 66 年举行的。因此 Samantha 参加的是 1985+6=19911985 + 6 = 1991 年的竞赛。
她那年 1212 岁,所以出生年份为 1991−12=19791991 - 12 = 1979。
所以正确答案是 A。
The seventh AMC 88 would have been administered 66 years after the first one. Therefore, Samantha took it in 1985+6=1991.1985 + 6 = 1991.
This means that Samantha was born 1212 years prior in 1991−12=1979.1991 - 12 = 1979.
Thus, A is the correct answer.
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