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Parent Post: The Riddle of the Vanishing Hourglass
zenny
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4/14/2025, 4:57:59 PM
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You can use the 7 min hourglass to time out all the others. Turn 7 every time it drains fully while keeping count of how many turns the others have had also flipping as soon as they empty, they should drain in sync with 7 on their 7th turns. Any that don't are the liars, if all three don't then it's the 7 minute hourglass. If either 7 or 11 is a liar, we can just use 13 and 17 to count 30 minutes. If 13 is the liar we can use 7 and 11 to get exactly 4 minutes on the 11 minute timer then use that with 17 to get 13 minutes on the 17 minute timer and then you'd use those 13 and flip the timer to get the remaining 17 minutes. If 17 is the liar. We can use the same logic as above to get exactly 4 minutes on the 11 minute timer add it to 13 for a faux 17 minute timer and finish with a turn of the 13 minute timer.
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grouchfkadiogenes
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4/14/2025, 7:17:35 PM
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[deleted by author]
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mirukitsune
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4/14/2025, 5:16:48 PM
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Look at you... counting like a good math student 😌 but maybe read all the comments next time? Someone already answered it. It's not math—it's dark magic. 🧙♂️✨ Well anyway, this just dropped > [The Riddle of the Cursed Tea Party](https://soj.ooo/p/killtime/post/c9a7b81025952746eec7105c861ca01d)
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