An electronic device makes a beep …
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Yogita Ingle 5 years, 5 months ago
The electronic device makes a beep together after every 15 minutes another device makes a beep after every 20 minutes
LCM is the minimum number that is divisible by both the numbers,
So, the minimum common time after they will beep is the LCM of 15 and 20
Factors of 15 =
Factors of 20 =
LCM of 15 and 20 is 60
So they will beep after 60 min =1 hour, hence it will again ring at 7 am.
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