Mathematics
NULL
Medium
Question
Five bells begin to toll together and then at intervals of 5, 10, 15, 20 and 25 seconds. After what interval will they toll together again?
A
5 min
✓ Official correct answer
B
5.5 min
C
5.2 min
D
None
Community credibility
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A
5 min
No member explanations yet for this option.
B
5.5 min
No member explanations yet for this option.
C
5.2 min
No member explanations yet for this option.
D
None
No member explanations yet for this option.
Explanation
LCM(5,10,15,20,25) = 300 seconds = 5 minutes.