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The square root of 81 is 9
as in 9 x 9 = 81
Yes, Route 81 South goes through Harrisburg, PA.
If you take the I-77 S route it'll take you approx. 14 hrs. and 14 mins.
If you take the I-79 S and the I-77 S route it'll take you approx. 14 hrs. and 20 mins.
If you take the I-81 S route it'll take you approx. 15 hrs. and 39 mins.
In Pennsylvania is route 80 or route 81 better for cars to avoid truck traffic
81 squares on a sudoku grid