Number puzzles with answers

Magic squares with answers

Write the numbers in the grid so that every row, every column and both diagonals add to the same total. Start on 3 × 3 squares of 1 to 9, then other numbers, then 4 × 4. Solve on screen with running totals, or print them with the answers.

Sudoku puzzles with answers

Fill every row, column and 3 × 3 box with the numbers 1 to 9. Solve on screen, or print the puzzles and the answer key; the hint names the first square you can fill.

Sudoku for kids with answers

Small grids for young solvers: fill every row, column and box with 1 to 4, or with 1 to 6. Stuck on a 6 × 6? Write the numbers a square could still take small in its corner, and cross them off as you fill the rest. Solve on screen or print them with the answers.

Jigsaw sudoku with answers

The 3 × 3 boxes are gone: each grid is cut into nine outlined pieces of nine squares, and every row, column and piece holds 1 to 9 once. Solve on screen or print them with the answers.

Killer sudoku with answers

No numbers are given. Each dashed cage shows the total of its squares, and no number repeats inside a cage. Begin with the cages that can be made only one way. Solve on screen or print them with the answers.

Word sudoku with answers

Sudoku with letters: each grid uses the letters of one word, once in every row, column and box, and when it is solved one row spells the word. Nine-letter grids, then six-letter grids for younger solvers. Solve on screen or print them.

Math brain teasers with answers

Math puzzles from easy to hard, grouped by topic with the difficulty marked on each. Every answer shows the working, so you can check the method as well as the result.

Math riddles with answers

Number riddles from quick mental math to tricky puzzles. Work each one out, then open the answer to check the working.

Printable blank sudoku grids

Choose a grid size, then print or download the blank worksheet. Copy your own puzzle into the grid.