Question

David、Hikmet、Jack、Marta、Rand 和 Todd 与另外 $6$ 人参加了一场 $12$ 人赛跑。Rand 比 Hikmet 领先 $6$ 个名次。Marta 比 Jack 落后 $1$ 个名次。David 比 Hikmet 落后 $2$ 个名次。Jack 比 Todd 落后 $2$ 个名次。Todd 比 Rand 落后 $1$ 个名次。Marta 得第 $6$ 名。谁得第 $8$ 名？

David, Hikmet, Jack, Marta, Rand, and Todd were in a $12$ -person race with $6$ other people. Rand finished $6$ places ahead of Hikmet. Marta finished $1$ place behind Jack. David finished $2$ places behind Hikmet. Jack finished $2$ places behind Todd. Todd finished $1$ place behind Rand. Marta finished in $6$ th place. Who finished in $8$ th place?

David

Hikmet

Jack

Rand

Todd

答案：B

知识点：逻辑推理逆推法

难度评级：1130

解答：

Marta 第 $6$ 名，所以 Jack 第 $5$ 名。Jack 比 Todd 落后 $2$ 名，所以 Todd 第 $3$ 名。Todd 比 Rand 落后 $1$ 名，所以 Rand 第 $2$ 名。

Rand 比 Hikmet 领先 $6$ 名，所以 Hikmet 第 $8$ 名。（David 第 $10$ 名。）

因此，正确选项是 B。

Marta is $6$ th, so Jack is $5$ th. Jack is $2$ behind Todd, so Todd is $3$ rd. Todd is $1$ behind Rand, so Rand is $2$ nd.

Rand is $6$ ahead of Hikmet, so Hikmet is $8$ th. (David is $10$ th.)

Thus, the correct answer is B.

2015 AMC 12B 第 4 题

答案：B

难度评级：1130

解答：

其他年份的第 4 题