选择题
2016 AMC 8 Problem 18: Sprint Races
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?
2016 AMC 8 第 18 题：冲刺赛
在全区田径运动会上，216 名短跑运动员参加 100 米短跑比赛。赛道有6条跑道，因此一次只能有6名短跑运动员参加比赛。每场比赛结束后，五名未获胜者将被淘汰，获胜者将在稍后的比赛中再次参加比赛。需要多少场比赛才能确定短跑冠军
A.
36
B.
42
C.
43
D.
60
E.
72