Number Fill-Ins — 80 Crossword Puzzles With Numbers 80 Number Fill-In puzzles — crossword-style grids where you place multi-digit numbers instead of words. Each puzzle has one correct arrangement. Start with unique-length numbers, cross-reference intersections, and build outward. No math, no vocabulary — pure spatial logic. 80 puzzles. 7 x 10 inch format. All solutions at the back. From DJAPE — 250+ puzzle books.