---
title: "Find the Mistake Level Up #7: 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 #7: play every level and see each answer."
url: https://sudokuflow.com/puzzles/level-up-7/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Level Up #7
Level Up
# Level Up #7
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/hebGAQ3KFXg)
## Level 1 · 4×4
Tap the digit you think is wrong.
Level Up #7 · Level 1 · 4×4:
```text
3 2* | 1 2
1* . | 4* 3
------+------
4* . | . 1*
2 . | 3 .
```
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 1, column 2. Row 1 already has a printed 2 (row 1, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 4.
## Level 2 · 6×6
Tap the digit you think is wrong.
Level Up #7 · Level 2 · 6×6:
```text
4 2* 5 | 6* . .
6 . 3 | 2* 5 .
---------+---------
2* 4 . | 5 1 3
1* . . | . 2* 6*
---------+---------
5 . 4* | . 6 2*
1 6 2 | 3 4* 5*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 1 in row 4, column 1. Column 1 already has a printed 1 (row 6, column 1). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 3.
## Level 3 · 9×9
Tap the digit you think is wrong.
Level Up #7 · Level 3 · 9×9:
```text
1* 2 6 | 3* 8* 4 | 7 5* 9
3 8 4 | 5* 7 9* | 1* 2 6
7 . . | 2* 6* 1* | 3 8 4*
---------+----------+---------
. 6 3 | 1* . 7 | 8 4* 5*
8* 1* . | 4* 3* 2 | 7* . .
4 . 7 | 8 . 6* | 2* 1 3
---------+----------+---------
6 3 1 | . . 5 | . . .
5 . 8 | . 1 3 | . 6 .
. . . | 6 4 8* | . . 1
```
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 5, column 7. Column 7 already has a printed 7 (row 1, column 7). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 6.
## 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.