Kakuro· Advanced

Goal

Fill in blank cells with numbers 1-9 so each group sums to its clue

Rules

  • Place numbers 1 through 9 in the white cells
  • No number may repeat within the same sum group
  • The numbers in each group must add up to the clue shown in the black cell
7
9
3
1
2
13
6
7

Start with groups that have the fewest possible combinations

For two-cell groups, a sum of 3 means 1+2, and a sum of 17 means 8+9

Adults who regularly solve number puzzles show significant improvements in arithmetic reasoning, working memory, and attention. Neuroimaging studies also confirm that constraint satisfaction tasks activate prefrontal executive functions.

  • Number puzzles and 14 cognitive measures in adults 50+ (Int J Geriatr Psychiatry, 2019)
  • Constraint satisfaction tasks activate prefrontal executive functions (Neuropsychologia, 2018)