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 早 $6$ 个名次完成。Marta 比 Jack 晚 $1$ 个名次。David 比 Hikmet 晚 $2$ 个名次。Jack 比 Todd 晚 $2$ 个名次。Todd 比 Rand 晚 $1$ 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

难度评级：960

小提示：

从 Marta 的第 $6$ 名往回推。

Work backward from Marta’s $6$ th place

大提示：

Hikmet 比 Rand 晚 $6$ 个名次。

Hikmet is $6$ places behind Rand

解答：

Marta 是第 $6$ 名，所以 Jack 是第 $5$ 名。Jack 比 Todd 晚 $2$ 个名次，所以 Todd 是第 $3$ 名；Todd 比 Rand 晚 $1$ 个名次，所以 Rand 是第 $2$ 名。

Hikmet 比 Rand 晚 $6$ 个名次，所以 Hikmet 是第 $8$ 名。

所以正确答案是 B。

Marta finished $6$ th, so Jack finished $5$ th. Since Jack finished $2$ places behind Todd, Todd finished $3$ rd. Since Todd finished $1$ place behind Rand, Rand finished $2$ nd.

Hikmet finished $6$ places behind Rand, so Hikmet finished $8$ th.

Thus, the correct answer is B.

2015 AMC 10B 第 5 题

答案：B

难度评级：960

小提示：

大提示：

解答：

其他年份的第 5 题