AMC8 2011

AMC8 2011 · Q5

AMC8 2011 · Q5. It mainly tests Arithmetic misc, Inequalities with integers (floor/ceiling basics).

What time was it 2011 minutes after the beginning of January 1, 2011?

从 2011 年 1 月 1 日开始后 2011 分钟是什么时间？

(A) January 1 at 9:31PM 1月1日晚上9:31

(B) January 1 at 11:51PM 1月1日晚上11:51

(D) January 2 at 9:31AM 1月2日上午9:31

(E) January 2 at 6:01PM 1月2日晚上6:01

Answer

Correct choice: (D)

正确答案：（D）

Solution

There are $60$ minutes in an hour. $2011/60=33\text{r}31,$ or $33$ hours and $31$ minutes. There are $24$ hours in a day, so the time is $9$ hours and $31$ minutes after midnight on January 2, 2011. $\Rightarrow\boxed{\textbf{(D)}\text{ January 2 at 9:31AM}}$

一小时有 $60$ 分钟。$2011/60=33\text{r}31$，即 $33$ 小时 $31$ 分钟。一天有 $24$ 小时，所以时间是 2011 年 1 月 2 日午夜后 $9$ 小时 $31$ 分钟。$\Rightarrow\boxed{\textbf{(D)}\text{ January 2 at 9:31AM}}$

Topics