Reverse Digit Span ↗
Remember the digits and enter them in reverse order.
Hold a string of letters in mind and recall it exactly.
Enable JavaScript to play. Instructions remain available below.
Recall exactly what you saw. M P X
After studying and hiding the prompt, the answer is MPX. Read in small groups, then recall without looking.
The string is a sequence of letters, not necessarily an English word. Preserve the displayed order rather than rearranging it into a familiar spelling. Grouping two or three letters can provide a personal recall strategy, but the submitted answer still needs the full sequence.
Explore grouping with number pairs
Group information into small meaningful units. On another day, compare sessions using the same game and similar conditions. A practiced strategy can improve this task without changing every aspect of memory.
This is a recreational memory activity. Results describe performance on this particular task, with this device and these rules. They are not a clinical assessment, IQ score or promise of improvements in daily life. Your best result and recent sessions stay in this browser; no account is required.
Yes. You can play the full activity without a payment, download or account.
Use Tab to focus buttons and Enter or Space to activate them. Answer fields accept normal typing. The maze also supports arrow keys. Timed tests will differ between touch, mouse and keyboard input.
Practice, a different generated puzzle, distractions and input timing all affect results. Compare several sessions rather than drawing a conclusion from one attempt.