‘The school bus left at 7.15 a.m., ten minutes later than usual, because the driver had stopped to change a tyre. Bilal had reached the stop at 7.00.’ At what time does the bus usually leave?
- 7.15 a.m. is the time the bus left today, not its usual time.
- ‘Ten minutes later than usual’ means the usual time is ten minutes earlier: 7.15 − 10 minutes = 7.05.
- 7.00 is when Bilal arrived, so it is a trap, not the answer.
Answer: The bus usually leaves at 7.05 a.m.