BMAD Posted July 5, 2013 Report Share Posted July 5, 2013 I have a stamp collection. It consists of three books. Two tenths of my stamps are in the first book, several sevenths in the second book, and there are 303 stamps in the third book. How many stamps do I own? Quote Link to comment Share on other sites More sharing options...
0 vistaptb Posted July 5, 2013 Report Share Posted July 5, 2013 3535 Quote Link to comment Share on other sites More sharing options...
0 BMAD Posted July 5, 2013 Author Report Share Posted July 5, 2013 3535 care to explain your logic? Quote Link to comment Share on other sites More sharing options...
0 Barcallica Posted July 6, 2013 Report Share Posted July 6, 2013 3535 care to explain your logic? Let x be the page number. Then 2x/10+xa/7+303=x ---> x*(28-5a)=10605. On the other hand 10605=3*5*7*101 also x>303 and a<7. So 28-5a should be 3,5,7,15 or 21. Since a is natural a can only be 5 and x=3535 Quote Link to comment Share on other sites More sharing options...
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BMAD
I have a stamp collection. It consists of three books. Two tenths of my stamps are in the first book, several sevenths in the second book, and there are 303 stamps in the third book. How many stamps do I own?
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