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### Number and algebra

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### Advanced mathematics

# 5 by 5 Mathdokus

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Age 7 to 16

Challenge Level

*5 by 5 Mathdokus printable sheet - difficulty 1
5 by 5 Mathdokus printable sheet - difficulty 2
5 by 5 Mathdokus printable sheet - difficulty 3*

In this 5 by 5 Mathematical Sudoku, you need to use the clues available to fill the twenty five cells.

Clicking on the purple cog in the top right corner allows you to access twelve different puzzles at different levels of difficulty.

If you are not familiar with Mathdokus, you may like to watch this introductory video, which gives you some ideas of the strategies you may find useful.

This Mathdoku belongs to a set, which also contains 3 by 3, 4 by 4 and 6 by 6 grid sizes.

**If you are considering sending us solutions, we are particularly interested to hear about any elegant strategies you used when you were stuck, and you think are worth sharing.**

**NRICH would like to thank Tetsuya Miyamoto, a Japanese maths teacher, whose puzzles have inspired our Mathdokus.**