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KenKen

KenKen

Min number of participants 1
Age 8+ yrs.
Safety support by adult Not required
Min duration 15 min.
Cost Low
Environment Indoor / Outdoor

A grid puzzle that combines Sudoku's no-repeat rows and columns with bold-outlined "cages" of cells that must combine, using addition, subtraction, multiplication, or division, to a printed target number.

The Essentials

Steps

  1. Look at the grid size — an n×n grid uses digits 1 through n, each appearing once per row and once per column.
  2. Solve single-cell cages first — the target number is simply the digit that goes there.
  3. For larger cages, list every digit combination that produces the target with the given operation, then eliminate options that would repeat a digit in that row or column.
  4. Fill in digits you're certain of, then use them to narrow down the remaining cages.

Tips

  • Start with small cages (2 cells) and cages using subtraction or division — they usually have fewer valid combinations.
  • Keep small pencil notes of candidate digits in a cell's corner until you can rule enough out.
  • Work the puzzle from multiple cages at once — progress in one area often unlocks another.
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