Date: Mon, 25 Nov 2002 14:18:08 -0500

Author: "Rick Tarara"

Subject: Re: mental gymnastics

Post:

70/PGR = DT is 70 years divided by the Population Growth Rate = Doubling
Time.

Rick


----- Original Message -----
From: "Anthony Lapinski"
To:
Sent: Monday, November 25, 2002 12:18 PM
Subject: mental gymnastics


> There are some "mental gymnastics" in the NJSTA newsletter that I use in
> my science club. Most answers are "scientific." For example:
>
> 5280 = F in a M (feet in a mile)
>
> 7 PC in L (primary colors in light)
>
>
> A few have stumped me:
>
> 70/PGR = DT
>
> 1/127 = A
>
> Anyone know what those letters stand for?
>

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