SOLUTION: a first bell ring at every 6 minutes, a second bell rings every 7 minutes and a third bell rings every 1 hour, if all the bells start ringing at 12 noon today when the next day wil

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Question 779615: a first bell ring at every 6 minutes, a second bell rings every 7 minutes and a third bell rings every 1 hour, if all the bells start ringing at 12 noon today when the next day will all ring at the same time
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The 1st two bells will ring at the same
time every +6%2A7+=+42+ min
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The 3rd bell ring once every hour, or
once every +60+ min
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What is the smallest multiple of +42+
that is evenly divided by +60+ ?
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+%28+10%2A42+%29+%2F+60+=+420%2F60+
+420%2F60+=+7+
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So, every +420+ min, all 3 bells ring together
+420+%2F+60+=+7+ hrs
12 noon + 7 hrs = 7 PM is when
they all ring together