Number Puzzle
Puzzle 5 of Hawaii Pack
Question is: Number Puzzle
and the answer is: SUDOKU
Word Meaning:
SUDOKU — (games) A type of pencil puzzle played on a square grid, requiring each of the columns, each of the rows, and each of the subregions (called "boxes" or "regions") to contain the lowest whole numbers up to the dimension of the puzzle, usually 1 to 9, once each. The subregions are rectangular or square except in variants.
Definitions from Wiktionary.