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A doctor gives you three pills telling you to take one every half hour. How many minutes would the pills last?
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A
60
💡 Explanation:
Take the first pill at time 0, the second pill 30 minutes later, and the third pill another 30 minutes later (at 60 minutes). The three pills span a 60-minute period. A common mistake is multiplying 3 pills × 30 minutes = 90 minutes, but the first pill is taken immediately.