Two taps drip together at exactly 1:00pm. one tap then drips again every 68 sec while the other tap continues to drip every 72 sec. At what time will the two taps both drip together again?

The least common multiple of 68 and 72 is 1224 so that means we have to add 1224 minutes to 1:00 pm. Convert that to 24 hour time: 1300. 1224 : 60 is 20.4. so the answer will be 1:20 pm.

P. S. delete this answer if it is wrong and tell me the right answer