---
title: "Printable Number Blocks: free, with answers | Once Books"
description: "Free printable Number Blocks. Fill each outlined block with 1 to its size, and no two equal digits may touch. Every puzzle has one solution, and prints with its answer."
source: "https://www.oncebooks.com/number-blocks"
---

Free printables

# Free printable Number Blocks with answers

Number Blocks, also called Suguru, divides the grid into outlined blocks: fill a block of k cells with 1 to k, and never let two equal digits touch, even diagonally. Every puzzle here has exactly one solution.

## By size

Size is what makes a Number Blocks harder: a bigger grid gives the logic more room. Start small and work up.

- [Easy Number Blocks](https://www.oncebooks.com/number-blocks/easy) — Free printable easy Number Blocks with answers. A gentle small grid that solves in a few minutes, with the answer on page two. No sign-up.
- [Medium Number Blocks](https://www.oncebooks.com/number-blocks/medium) — Free printable medium Number Blocks with answers. An everyday grid with one solution. Print with the answer.
- [Hard Number Blocks](https://www.oncebooks.com/number-blocks/hard) — Free printable hard Number Blocks with answers. A bigger grid for a longer solve, with one solution. Print with the answer.
- [Large Number Blocks](https://www.oncebooks.com/number-blocks/large) — Free printable large Number Blocks with answers. The biggest grid, for a long solve, with the answer on page two. No sign-up.

## By audience

A smaller grid with a gentle rule is the easiest way for a child or a beginner to start.

- [Number Blocks for kids](https://www.oncebooks.com/number-blocks/for-kids) — Free printable Number Blocks for kids with answers. Small grids with a gentle rule, each with one solution. No sign-up.
- [Number Blocks for beginners](https://www.oncebooks.com/number-blocks/for-beginners) — Free printable Number Blocks for beginners with answers. Small grids to learn the rule, each with one solution. Print with the answer.

## One answer, every time

What makes a Number Blocks book worth printing is the guarantee most sellers cannot make: every puzzle is generated and proved by the same solver our Publisher Studio uses, so the clues fix exactly one solution. The answer prints at the back.

## 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. Size 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. Place the givens. Start from the printed digits and the small blocks, where there are fewest choices.
3. Watch the neighbours. A digit blocks that same digit from all eight surrounding cells, so a placed number rules out its neighbours.
4. Work 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.

## Make one now

Pick a size, then print the puzzle and its answer. No sign-up, no watermark.

[Open the Number Blocks generator](https://www.oncebooks.com/tools/number-blocks-generator)[Make a whole book for KDP](https://www.oncebooks.com/kdp-number-blocks-maker)