Question : Five bells ring together at the intervals of 3, 5, 8, 9, and 10 seconds. All the bells ring simultaneously at the same time. They will again ring simultaneously after:
Option 1: 6 minutes
Option 2: 8 minutes
Option 3: 9 minutes
Option 4: 4 minutes
Correct Answer: 6 minutes
Solution :
Five bells ring together at intervals of 3, 5, 8, 9, and 10 seconds
Calculation:
By taking the Least Common Multiple for 3, 5, 8, 9, and 10 seconds = 360 seconds
= 6 minutes
$\therefore$ All the bell rings together in 6 minutes.
Hence, the correct answer is 6 minutes.
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