If a doctor gives you three pills and tells you to take one every half hour, how long will the pills last?
1 hour
You take the first pill immediately (at 0 minutes), the second pill at 30 minutes, and the third pill at 60 minutes (1 hour).
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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