document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #540474 by ankor@dixie-net.com(22740)\"\" \"About 
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Isaac goes hiking every 9 days and swimming every 13 days.
\n" ); document.write( " He did both kinds of exercise today.
\n" ); document.write( " How many days from now will he next go both hiking and swimming again?
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\n" ); document.write( "Find the least common multiple of 9 and 13, 13 is a prime number, therefore
\n" ); document.write( "9*13 = 117 days
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