15. five alarms start beeping together and beep at intervals of 2, 4, 6, 8 and 12 seconds respectively. in 48 minutes, how many times do they beep together? a. 40 b. 100 c. 150 d. 120
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None of the above. there will be 3240 beeps in 48 MINUTES as the intervals are in SECONDS
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