Question

一八一二年战争于一八一二年六月十八日星期四宣战开始。结束战争的和平条约在 $919$ 天后，即一八一四年十二月二十四日签署。条约是在星期几签署的？

The War of 1812 started with a declaration of war on Thursday, June 18, 1812. The peace treaty to end the war was signed $919$ days later, on December 24, 1814. On what day of the week was the treaty signed?

星期五

Friday

星期六

Saturday

星期日

Sunday

星期一

Monday

星期二

Tuesday

答案：B

知识点：模运算日期与时间

难度评级：1200

解答：

因为 $919=7\cdot131+2$ ，条约签署日比星期四晚 $131$ 个整周再加 $2$ 天。

星期四后两天是星期六。所以正确答案是 B。

Because $919=7\cdot131+2,$ the treaty was signed $131$ full weeks plus $2$ days after Thursday. Two days beyond Thursday is Saturday.

Thus, the correct answer is B.

2016 AMC 12B 第 5 题

答案：B

难度评级：1200

解答：

其他年份的第 5 题