Free printable number grid worksheets
375 print-ready PDF packs across five difficulty levels — 8 puzzles per pack, full answer key on the last page. Square cells are numbers, round cells are operations, and every row and column is an equation read left to right. The numbers inside the grid are a fixed set used once each, the way a sudoku box holds each of 1–9. Download and print.
Easy number grid
3×3 equations with addition and subtraction only. The nine inside squares use each of 1–9 once — great for classrooms and early practice.
Medium number grid
3×3 equations adding multiplication. Same 1–9 pool inside the grid, more candidates to weigh, larger totals.
Hard number grid
4×4 equations with all four operations and the occasional blank operator to deduce. The sixteen inside squares use each of 1–16 once.
Expert number grid
5×5 equations with several blank operators, using each of 1–25 once inside the grid. Methodical cross-referencing between rows and columns required.
Einstein number grid
6×6 equations with blank operators, using each of −12 to −1 and 1 to 24 once inside the grid. The full toolkit — logic only, no guessing.
About these worksheets
Each PDF is three pages: two pages of puzzle grids (four per page) followed by a full answer key. Given numbers are printed in bold; blank squares and empty operator circles are left for you to solve with a pencil. All puzzles are computer-verified to have exactly one solution and can be solved through logic alone — no guessing. That single solution rests on the pool rule: a 3×3 uses each of 1–9 exactly once, a 4×4 each of 1–16, a 5×5 each of 1–25, and a 6×6 each of −12 to −1 and 1 to 24. The results after the equals signs are totals, outside the pool, and may repeat.
Packs are numbered sequentially within each difficulty. Pack 01 contains puzzles 1–8, Pack 02 contains puzzles 9–16, and so on up to Pack 75 (puzzles 593–600). Each difficulty has 600 distinct puzzles total.
If you'd rather solve interactively, play number grids online with hints and step-by-step solutions, or read the number grid rules guide before tackling harder packs. For younger solvers, the number grids for kids page focuses on addition and subtraction only.