Complete 1 to 81 so the numbers follow a horizontal or vertical path -- no diagonals.
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Solution to the Problem:
Correctly solved by:
| 1. Rebecca Hayes | Madison, Wisconsin |
| 2. Emre Karabıyık |
Hacettepe University, ANKARA, TURKEY |
| 3. Ivy Joseph | Pune, Maharashtra, India |
| 4. Colin (Yowie) Bowey | Beechworth, Victoria, Australia |