Working memory
Serial Addition
Don't add up the total — add each new number to the one before it. Discard everything else. That's the hard part.
How to play
A number appears
Each number shows briefly. The previous one fades — you must hold it in memory.
Add previous + current
Add only these two — the last number and the new one. Ignore all the rest.
Pick the answer quickly
Four choices appear. Select the right one before the bar runs out, or lose a life.
Starting level
1
2.3s to answer · min 1 · max 12
3Lives
12Levels
4Choices
Leaderboard
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