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Posted by on Saturday, August 1, 2009 at 5:55pm.

A student opens a mathematics book to two facing pages. The product of the pages numbers is 420. Find the page numbers.


The first page is ? and the second page is ?
Thank you

  • math - , Saturday, August 1, 2009 at 5:58pm

    n(n+1)=420
    solve for n

  • math - , Saturday, August 1, 2009 at 5:59pm

    The square root of 420 = 20.49

    Let's try 20 and 21 as the facing pages. Is the product 420?

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