devicecheckers
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Number Memory

A number appears, then disappears. Type it back. Each correct answer adds one digit.

Best: — digits

Ready

Level 1

Press start. The number stays up a little longer as it grows.

More tests

Visual Memory Remember which squares lit up, then click them back. Typing Speed Test Measure words per minute and accuracy on a timed passage. Reaction Time Test Measure how fast you respond, in milliseconds.

What it measures

Level

The current number of digits. A correct answer adds one.

Best

The longest run you have finished, saved on this device.

Questions

How long is the number shown?
A little longer than a second, plus a bit more for every extra digit.

Does the site store my answers?
No. Only the best length stays in local storage on this browser.