Question

271 sprinters enter a race the track has 7 lane so only 7 can compete at a time at the end 6 non winners are eliminated and the winners race in a later race how many races are needed to finish

Answer 1

53 races are needed to finish.

Determination of quantities

Given that 271 sprinters enter a race, and the track has 7 lane so only 7 can compete at a time, and at the end 6 non winners are eliminated and the winners race in a later race, to determine how many races are needed to finish the following calculation must be performed:

• 271 / 7 = 38.71 (39)
• 39 / 7 = 5.57 (6)
• 45 / 7 = 6.42 (7)
• 7 / 7 = 1
• 39 + 6 + 7 + 1 = X
• 53 = X

Therefore, 53 races are needed to finish.

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