Question

克里斯今年的生日在星期四。她生日后 $60$ 天是星期几？

Chris’ birthday is on a Thursday this year. What day of the week will it be $60$ days after her birthday?

星期一

Monday

星期三

Wednesday

星期四

Thursday

星期五

Friday

星期六

Saturday

星期每 $7$ 天重复一次，所以只需要看 $60$ 除以 $7$ 的余数

The day of the week repeats every $7$ days, so only the remainder of $60$ upon division by $7$ matters

$60 = 8 \times 7 + 4$ ，所以那一天是星期四后的第 $4$ 天

$60 = 8 \times 7 + 4,$ so the day is $4$ days after Thursday

星期每 $7$ 天重复。因为 $60 = 8 \times 7 + 4$ ，所以 $60$ 天后是星期四后的第 $4$ 天。

从星期四往后数：星期五、星期六、星期日、星期一。所以是星期一。

所以正确答案是 A。

Days of the week repeat every $7$ days. Since $60 = 8 \times 7 + 4,$ the day $60$ days later is $4$ days after Thursday.

Counting forward from Thursday: Friday, Saturday, Sunday, Monday. So it is a Monday.

Thus, the correct answer is A .