Number Memory Test
This test measures your short-term memory. A number appears for three seconds, then disappears.
Type the number you saw. Get it right and one more digit is added. A wrong answer ends the test.
Your past attempts
What number memory is
Number memory (digit span) is a core measure of short-term memory. It is a standard subtest in the Wechsler intelligence scales.
George Miller's classic 1956 paper showed the human mind can hold about 7±2 items at once, the "magical number seven". This test puts your own span to the test, one digit at a time.
Questions
How many digits do most people remember?
Most people hold 7±2 digits (Miller, 1956). Below 5 is low, 9 or more is high capacity.
What does this test measure?
Short-term (working) memory and attention. It follows the same principle as the Wechsler Digit Span subtest.
Can I improve with practice?
Only a little. Chunking (grouping digits) can help, but biological capacity is largely fixed.