3 ms·
No, this is precisely correct. To simplify further: 1. Start H4 and H7 2. Flip H4 when it runs out (4-minute mark) 3. Flip H7 when it runs out (7-minute mark
by xianshou 3y ago
No, this is precisely correct. To simplify further:
1. Start H4 and H7
2. Flip H4 when it runs out (4-minute mark)
3. Flip H7 when it runs out (7-minute mark, 1 minute left on H4)
4. Flip H7 back when H4 runs out again (8-minute mark, 1 minute elapsed on H7)
5. When H7 runs out again (after 1 minute), exactly 9 minutes have passed
- sterlind 3y agoYour summary is incorrect. Step 3 doesn't match what GPT-4 actually said: > When the 7-minute hourglass runs out, don't flip it yet, but note that the 4-minute hourglass has now been running for 3 minutes on its second run. (This marks 7 minutes.) When the 4-minute hourglass runs out again, flip the 7-minute hourglass. (This marks 8 minutes.) Notice that GPT-4 says not to flip H7 when it runs out, which is a mistake.