Question

Three bells ring at intervals of 10 , 12 and 15 minutes respectively at 8 :30b, at what time they rang together again ?
step wise needed answer
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Answer 1

Answer: 9.30

Step-by-step explanation:

Fine the LCM of 10, 12, 15

2| 5 6 15

5| 1 6 3

3| 1 2 1

2 x 5 x 3 x 1 x 2 x 1 = 60 min

8.30 + 60 mins = 9.30