---
title: "Find the Mistake Level Up #10: 3 Sudoku Levels | Sudoku Flow"
description: "Three Sudoku boards, one wrong number in each: a 4×4, a 6×6, then a full 9×9. Level Up #10: play every level and see each answer."
url: https://sudokuflow.com/puzzles/level-up-10/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Level Up #10
Level Up
# Level Up #10
Three boards, each with one wrong number, from a small 4×4 to a full 9×9. Play every level here, at your own pace.
[Watch on YouTube](https://youtube.com/shorts/MalBIH-r9l4)
## Level 1 · 4×4
Tap the digit you think is wrong.
Level Up #10 · Level 1 · 4×4:
```text
3* 4* | . 2
2* . | 3* 4
------+------
4* 1 | . .
2 3 | 4 .
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 2 in row 2, column 1. Column 1 already has a printed 2 (row 4, column 1). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 1.
## Level 2 · 6×6
Tap the digit you think is wrong.
Level Up #10 · Level 2 · 6×6:
```text
. 6* . | . . 5*
3* 5 4 | 1 6 3
---------+---------
5 3* 6 | . 2 1
. 1* 2 | 5* 3 .
---------+---------
1* 4 3 | . 5 .
. 2* 5 | 3* 1* 4*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 3 in row 2, column 1. Row 2 already has a printed 3 (row 2, column 6). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 2.
## Level 3 · 9×9
Tap the digit you think is wrong.
Level Up #10 · Level 3 · 9×9:
```text
1 4* 3* | 9 8* 2 | 5 6* 7
. 8 . | 6* 5* 7* | 1 4 3
5* 6* 2* | . 3* . | 9* 8 2
---------+----------+---------
4 . . | . 6 3 | . . 5
. 7 5 | . 9 . | 8* . 6*
. 1 6 | . 7* 8 | 4 . 9*
---------+----------+---------
8* 3 1 | 7 2 9 | 6 5 4*
6 . . | 3 1* 5 | . . 8
7 5 . | 8* 4* 6 | . . 1*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 2 in row 3, column 3. Row 3 already has a printed 2 (row 3, column 9). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 7.
## Want more boards like this?
We also make a Sudoku app for iPhone, iPad, Mac and Android. There are no ads in it at all, it works offline, and when you ask for a hint it shows you the technique instead of just filling in a number.
[App Store iPhone, iPad, Mac](https://apps.apple.com/app/apple-store/id6502922368?pt=125379530&ct=sudokuflow_web&mt=8) [Google Play Android](https://play.google.com/store/apps/details?id=com.rubigogames.sudoku&referrer=utm_source%3Dsudokuflow%26utm_medium%3Dweb%26utm_campaign%3Dsite)
Sudoku Flow is made by Rubigo Games, the developer of the Sudoku app recommended on this site.