Magic squares
Complete the square so every row, column and both main diagonals add to the same total. Use each number once.
Complete a 3 × 3 square with six numbers given. Each line totals 15.
1 square · No time limit · Hints available
Example
An example to explore. No score or practice round is recorded.
- Filled
- 0 / 3
- Active time
- 0:00
Numbers to place
0 hints used
Use arrow keys to move between squares. Choose a number button, or press 1 to 9. For larger numbers, use the number buttons. Delete erases a square.
Round complete
Optional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
How this data is usedHow to play
Every row, column and both corner-to-corner diagonals must reach the target. Use each number once in the whole square. Shaded numbers stay in place.
A hint explains and places one next number. Undo does not remove the hint count. Check only examines visible rules, such as repeated numbers and line totals. It does not reveal hidden answers.
Only a completed square is saved. Hinted squares stay in Progress and are excluded from unassisted time comparisons. Ending an unfinished square saves no result.
Learn a method: Balance a magic square.
The levels increase the size or complexity of the problems. They have not been calibrated against human performance and do not measure IQ.
About this practice
Learn a method
Balance the magic squareComplete the square so every row, column and both main diagonals add to the same total. Use each number once.
Report a problem
Optional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
How this data is used