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Rule Switch

A new rule with every digit

20 questions. Follow the written cue, then use the Left/Right arrow keys or choose one of two answers. Take care with accuracy as well as speed.

How to play Rule Switch

The rule changes after every answer. Read the cue before judging the digit.

Odd or even? Choose Odd or Even. Compare with 5: choose 5 or less, or More than 5.

Use the Left and Right arrow keys, or choose the matching buttons.

Answer 20 questions. Accuracy comes first; mean response time includes correct answers only. A faster run replaces your local best only when accuracy is tied.

Opening Help or leaving the test interrupts a run. Start again when you are ready; unfinished runs are not saved.

What your result means

This task asks you to follow a different rule on every question. Your result shows correct answers out of 20 and the mean time for correct responses, measured from the appearance of each cue and digit.

Your local best prioritizes accuracy, then faster correct responses when accuracy is tied. A run with no correct answers still saves an accuracy result; it has no correct-response timing average.

Your best saves automatically on this device. Compare your own runs under similar conditions; your device, distractions, and practice can affect response times.

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