Question

在一次全地区田径赛中， $216$ 名短跑运动员参加 $100$ 米短跑比赛。跑道有 $6$ 条道，所以一次只能有 $6$ 名运动员比赛。每场比赛结束后，五名非获胜者被淘汰，获胜者将在后面的比赛中继续参赛。

需要多少场比赛才能决出短跑冠军？

In an All-Area track meet, $216$ sprinters enter a $100$ -meter dash competition. The track has $6$ lanes, so only $6$ sprinters can compete at a time. At the end of each race, the five non-winners are eliminated, and the winner will compete again in a later race.

How many races are needed to determine the champion sprinter?

$36$

$42$

$43$

$60$

$72$

答案：C

知识点：基本计数

难度评级：1170

视频讲解：

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文字解答：

每场比赛淘汰 $5$ 人。要决出冠军，需要淘汰 $215$ 人。因此需要 $215 / 5 = 43$ 场比赛。

所以正确答案是 C。

Note that each race eliminates $5$ people. For there to be a winner, $215$ must be eliminated. Therefore, $215 / 5 = 43$ races are required to eliminate this number of people.

Thus, C is the correct answer.

2016 AMC 8 第 18 题

答案：C

难度评级：1170

视频讲解：

文字解答：

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