Colouring NestHard Sudoku #7
- Ages 12+
- Hard
- 2 pages
- Sudoku
- Answer key
- PDF: Letter & A4
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Tip: download the PDF for Letter or A4 paper, print it at 100% and use a pencil or crayon. Tap "Show solution" to check your answer, or print it as an answer key.
Up nextHard Sudoku #8 →A 9×9 sudoku for confident solvers, teens and adults, that cannot be finished by spotting single numbers alone: you will need pairs and “only in this row” reasoning, with no guessing. 26 of the 81 squares are filled in. Fill the rest so that every row, column and 3×3 box has the numbers 1 to 9 once each. Every puzzle here has been checked by a solver to have exactly one solution.
Text version of the puzzle
. 2 4 | 5 . . | . . . . 7 1 | . 3 . | . . . 5 . . | . . 6 | . 7 . . . . | . 9 . | 2 . 1 9 . . | . . . | . . 7 7 . 8 | . 5 . | . . . . 3 . | 7 . . | . . 5 . . . | . 8 . | 1 2 . . . . | . . 4 | 7 9 .
A dot is an empty square; a bar separates the boxes.
More puzzles: Nonograms · Mazes · Large-print sudoku
For teachers and parents
- What it practises
- Logical reasoning, working through options one at a time, number (or picture) recognition
- How to use it
- Look at one row, column or box and ask which number is missing. Write in only the numbers you are sure of; a pencil and eraser help. Check with “Show solution” or the answer key on page 2.
- Time
- About 30–45 minutes
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Printing tips
- Print at 100% (actual size) and solve in pencil so mistakes rub out.
- Print page 2 separately as the answer key.
- For picture sudoku, print page 1 twice: one to solve, one to cut the pieces from.
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