Wisconsin is made up of 72 counties, this cache is focused on Rock county. Rock County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 160,331. Its county seat is Janesville. Rock County comprises the Janesville-Beloit, WI Metropolitan Statistical Area and is included in the Madison-Janesville-Beloit, WI Combined Statistical Area. Here are a few stats about Rock County, courtesy of Wikipedia. You can learn more about Rock county at: https://en.wikipedia.org/wiki/Rock_County,_Wisconsin
This county's oldest geocache is GC65B Magnolia Bluff, placed by Jeremy & rcidriver.
You will find this cache at N44 35.ABC W90 02.DEF
A & B: As of the 2010 census, the population was 16B,33A.
C: How many letters in the name of the county?
D & F: Rock County was created in 1836 as a territorial county on December D, 1836 from Milwaukee County and fully organized February 19, 183F.
E: The oldest geocache was hidden : 0E/08/2001.
SOURCE: Most of the information on this page was obtained from Wikipedia's page about this Wisconsin county.
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CHECK SUM: A+B+C=5 D+E+F=20