Put the digits 1-n, each used exactly once, into the grid so that:

1) no row or column contains exactly one digit,
2) every row or column that contains 2 or more digits contains a fulcrum,
3) each fulcrum is located where those weights would balance (equal torques on both sides).

A sample puzzle is shown below, with its solution:

digits 1-8:     →

Each puzzle below has a unique solution. All puzzles copyright Erich Friedman, 2009.

---

digits 1-7:

---

digits 1-8:

---

digits 1-9:

---

Back to