---
title: "Find the Mistake Level Up #11: 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 #11: play every level and see each answer."
url: https://sudokuflow.com/puzzles/level-up-11/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Level Up #11
Level Up
# Level Up #11
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/soESTKHSDcI)
## Level 1 · 4×4
Tap the digit you think is wrong.
Level Up #11 · Level 1 · 4×4:
```text
3* . | 2 .
4 2* | 4* 3
------+------
. . | . 2
2* 4* | 3 1
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 4 in row 2, column 3. Row 2 already has a printed 4 (row 2, 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 #11 · Level 2 · 6×6:
```text
2 6* 3* | 4 1 .
4 . 1 | 6 . 2*
---------+---------
. 2 6* | . 4 5
5 4* 3 | 2* 6* 1*
---------+---------
. . . | . 3 4*
3 5* 4* | 1 . 6
```
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 1, column 3. Column 3 already has a printed 3 (row 4, column 3). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 5.
## Level 3 · 9×9
Tap the digit you think is wrong.
Level Up #11 · Level 3 · 9×9:
```text
4 3* . | . 6 2* | . . 7
6* 2* 8 | . . 7 | 4 3 .
. 5 7 | 4* . 3 | 6 2 .
---------+----------+---------
2 4 6 | 7 3 1 | 8* 9 5
3 . 5* | 2 9* 8* | . 4* 6
8* . . | 6* 4 5 | 3 . 2*
---------+----------+---------
. 6* 4* | . . 9 | 2* . 3
5 8 2 | 3* 7* 4 | . 6* .
. . 3 | 1 2* 6 | 5 8* 7*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 7 in row 9, column 9. Column 9 already has a printed 7 (row 1, column 9). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 4.
## 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.