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City buses leave a depot every 25 minutes. The first bus leaves at the morning time on clock A. How many buses leave before the time on clock B?

Competition practiceClocks
  • A7
  • B6
  • C8
  • D9

Step-by-Step Solution

A shows 6:10 and B shows 9:00. Buses leave at 6:10, 6:35, 7:00, 7:25, 7:50, 8:15 and 8:40; the next is 9:05. That is 7. (6 forgets the first bus.)
Answer: A) 7

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