Audio-Technica ATH-M20x
Wired closed-back headphones for listening to recordings and audio practice.
Compatibility notes
Needs a compatible headphone output or adapter; this wired model has no built-in microphone and is not the M20xBT.
Games
Free. No account needed.Magic square
Fill the empty cells with the unused digits 1–9. Every row, column and long diagonal must total 15.
Optional equipment
If you also use your device for listening to audio, these wired headphones are an option to compare. This tool or game does not require headphones.
You do not need to buy anything to use this free tool.
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How it works
- Fill the empty cells with the unused digits 1–9. Every row, column and long diagonal must total 15.
- Tap the buttons or reach them with Tab and activate with Enter/Space. New game resets the round.
Example & practical use
In a row with 8, an empty square and 6, the missing digit is 15 − 8 − 6 = 1. Its column must still add up to 15.
Limits and help
Runs on this device. No online multiplayer, prizes or money. Puzzles and memory games are not medical or ability assessments.
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Troubleshooting
If a move does not register, check the current turn or round status. For keyboard play, focus the play area or a game control first. Check your score before restarting because a new game resets the current round.