• 0

several sevenths of stamps

Question

Posted · Report post

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?

0

Share this post


Link to post
Share on other sites

3 answers to this question

  • 0

Posted · Report post

3535

0

Share this post


Link to post
Share on other sites
  • 0

Posted · Report post

3535

care to explain your logic?

0

Share this post


Link to post
Share on other sites
  • 0

Posted · Report post

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

0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.