You plan a continuous six-hour drive and follow the advice to stop at least every two hours. How many rest stops must you plan before you arrive?

Answer and explanation

Correct answer: C. Two, after two hours and after four hours

  1. Step 1: The advice is to stop at least every two hours. Step 2. Stops fall at 2 hours and 4 hours, and the third two-hour mark is the arrival at 6 hours, so no further stop is needed. Answer: Two, after two hours and after four hours. Why not the others: Counting the arrival gives three, a single halfway stop leaves three hours without rest, and one stop an hour is more than needed.

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