document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1142863>Question 1142863</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Leo is five years younger than Mario, and Mario's age is 3 times younger than their dad's. The sum of Leo's and Mario's age is 21. Find all of their ages. </SPAN>\n" );
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document.write( "The sum of Leo's age and Mario's age is 21, and Leo is 5 years younger than Mario.  That makes Mario 13 and Leo 8.  Use formal algebra if you want to determine that -- or simply find two numbers whose sum is 21 and whose difference is 5.<br><BR>\n" );
document.write( "The rest of the problem can't be answered, because the phrase \"...3 times younger than...\" has no useful meaning.<br><BR>\n" );
document.write( "We have found that Mario's age is 13.  If 13 is \"3 times younger than their dad's\" age, that means if their dad's age is x, then 13 is equal to x - 3x = -2x.  So that would mean -2x = 13, making their dad's age -6.5 -- which of course is nonsense. </SPAN>\n" );
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