Question

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?

Answer 1

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