Date: Mon, 04 Mar 2002 21:14:01 -0500
To: WSFA members <WSFAlist at keithlynch.net>
From: Candy Madigan <candymadigan at mindspring.com>
Subject: [WSFA] Re: math Question
Reply-To: WSFA members <WSFAlist at keithlynch.net>

Thanks!

That was enough clue for me to figure it out!

At 08:58 PM 03/04/2002 -0500, you wrote:
>Candy Madigan <candymadigan at mindspring.com> wrote:
> > What 2 whole numbers multiplied together = 1,000,000,000?
>
>That number (one billion) can be factored into 2^9 * 5^9.  For your
>first divisor you can choose anywhere from zero to nine of the 2s,
>and multiply it by anywhere from zero to nine of the 5s, giving 100
>possible divisors.  Each of these divisors must be paired with one
>billion divided by that divisor.  So there are 100 possible answers.
>
>If the order of the divisors doesn't matter, there are only 50 answers.
>Examples include:
>
>    1 * 1,000,000,000
>
>    2 *   500,000,000
>    4 *   250,000,000
>    8 *   125,000,000
>   16 *    62,500,000
>
>    5 *   200,000,000
>   25 *    40,000,000
>  125 *     8,000,000
>  625 *     1,600,000
>
>   10 *   100,000,000
>  100 *    10,000,000
>1000 *     1,000,000
>
>One billion is not a square.  It's not the product of a whole number
>by that same whole number.  It's more than the square of 31,622, and
>less than the square of 31,623.
>--
>Keith F. Lynch - kfl at keithlynch.net - http://keithlynch.net/
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