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For kids Number Blocks

A friendly introduction for children: a small grid and a simple rule. fill each block with 1 to its size, and no two equal digits may touch. Each has exactly one solution.

Larger grids with fewer givens are harder. Every puzzle has one solution.

5×5 grid. Fill each block with 1 to its size; no two equal digits may touch, even diagonally.

Two pages: the puzzle and its answer. Every puzzle has one solution, checked by the same engine as our KDP studio.

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This makes one puzzle. Sign up to turn it into a full Number Blocks book for Amazon KDP: hundreds of graded puzzles at any trim, as print-ready PDFs.

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Preview

How to solve number blocks

Fill each outlined block of k cells with the numbers 1 to k, and never let two equal digits touch, even diagonally.

The method

  1. 1Size each block. A block of three cells holds 1, 2, 3; a block of five holds 1 to 5. Count the cells to know its digits.
  2. 2Place the givens. Start from the printed digits and the small blocks, where there are fewest choices.
  3. 3Watch the neighbours. A digit blocks that same digit from all eight surrounding cells, so a placed number rules out its neighbours.
  4. 4Work block by block. Fill a block with its missing digits so none clashes with a touching cell, then move to the next.
The one rule
Each block holds 1 to its size, and equal digits never touch.
What the answer page shows
The completed grid is printed at the back.
How the grades differ
Bigger grids and fewer givens mean more to deduce.
Good for
Solvers who like a compact, quick logic grid.

Making a whole Number Blocks book?

This page makes one puzzle. To publish a book on Amazon KDP, the KDP Number Blocks maker generates hundreds of graded puzzles at any trim, as a print-ready 300 DPI interior and solutions PDF.

More printable Number Blocks

See every printable Number Blocks

Questions

Are these number blocks for kids free to print?
Yes. Generate the puzzle above and print it with its answer, at no cost and with no sign-up.
Does every puzzle have one solution?
Yes. Every puzzle is generated and checked so the clues fix exactly one solution, verified before it prints. The answer is on the second page.
Can I make a Number Blocks book to sell on KDP?
Yes. The free tool makes one puzzle. The KDP Number Blocks maker generates hundreds of graded puzzles at any KDP trim, as a print-ready 300 DPI interior and solutions PDF.

Publish a Number Blocks book

Hundreds of graded puzzles, any KDP trim, print-ready PDFs. Start free.