Answer:
Given that,
Calvin has three alarm clocks which sound at different intervals.
Clock A goes off every 10 minutes
Clock B every 15 minutes
Clock C every 20 minutes.
To find: the three clocks sound together every _minutes
The three clock sounds together for every least common minutes of the 3 clocks (A,B,C)
To find LCM of 10,15,20.
we get,
LCM of 10,15,20 is 60
Therefore we get that,
The three clock sounds together for every 60 minutes.
Answer is:
The three clock sounds together for every 60 minutes.
