SOLUTION: Isaac goes hiking every 9 days and swimming every 13 days. He did both kinds of exercise today. How many days from now will he next go both hiking and swimming again?

Question 892406: Isaac goes hiking every 9 days and swimming every 13 days. He did both kinds of exercise today. How many days from now will he next go both hiking and swimming again?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Isaac goes hiking every 9 days and swimming every 13 days.
He did both kinds of exercise today.
How many days from now will he next go both hiking and swimming again?
:
Find the least common multiple of 9 and 13, 13 is a prime number, therefore
9*13 = 117 days
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