---
title: "Printable Calcudoku: free, with answers | Once Books"
description: "Free printable Calcudoku. Fill the grid with 1 to N once per row and column so every outlined cage combines by its operator to its target. Every puzzle has one solution, and prints with its answer."
source: "https://www.oncebooks.com/calcudoku"
---

Free printables

# Free printable Calcudoku with answers

Calcudoku, also called Mathdoku, is a Latin square with arithmetic cages: fill 1 to N once per row and column, and make every outlined cage reach its printed target. Every puzzle here has exactly one solution.

## By size

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

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

- [Calcudoku for kids](https://www.oncebooks.com/calcudoku/for-kids) — Free printable Calcudoku for kids with answers. Small grids with a gentle rule, each with one solution. No sign-up.
- [Calcudoku for beginners](https://www.oncebooks.com/calcudoku/for-beginners) — Free printable Calcudoku 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 Calcudoku 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 a calcudoku

Fill the grid with 1 to N once in each row and column so every outlined cage combines by its operator to its target.

### The method

1. Read each cage. The small label is the target and the operator the cage must reach: a sum, difference, product or quotient of its cells.
2. Start with single-cell cages. A cage of one cell is just that number given, so place it first and let it constrain its row and column.
3. List the combinations. For a cage, work out which sets of digits reach its target, then cross off any that repeat a digit in a shared row or column.
4. Cross cages with rows and columns. A digit must satisfy its cage and keep its row and column to 1 to N once each. Where only one option does both, lock it in.

**The one rule**

1 to N once per row and column, and every cage hits its target.

**What the answer page shows**

The completed grid is printed at the back.

**How the grades differ**

Bigger grids and larger cages leave more combinations to weigh.

**Good for**

Solvers who like arithmetic with their logic.

## Make one now

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

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