Number Memory Test
A number memory test where you choose the digit count and display time and practice as many times as you like. Once the number disappears, type what you saw.
How this test works
Pick a digit count (3-15) and a display time (0.5-5s) with the sliders, then press Start. A random number shows for exactly the time you chose. Once it disappears, type what you saw and check your answer.
How this differs from FLASH: FLASH is a speed game where the display time automatically shrinks as you go. This tool keeps digits and time fixed at whatever you pick, so you can practice the same setting over and over at your own pace.
How to get better
- Instead of reading digit by digit, group them into chunks of 2-3 — it's easier to hold onto a few chunks than many single digits
- Turning digits into a story, rhyme, or familiar pattern (like a date) makes them stick
- Start at a digit count you can clear comfortably, then add one digit at a time as you succeed to push your best
Want to measure rapid recognition or reaction too?
Try FLASH, which automatically increases in difficulty, or our reaction time test. MIKIRI has seven free games — visual search (MATCH), eye tracking (FOLLOW) — each with a global top-100 leaderboard.
Try other tests
FAQ
- What's a normal number of digits to remember?
- Short-term memory is often estimated around 7 digits (the classic "magic number seven"), though techniques like chunking can push some people well past 10.
- Does a longer display time make it easier?
- Yes — a longer display leans more toward "careful study" than pure snapshot memory. If you want to test instant recall, set a short display time.
- Which is the more serious memory test, this or FLASH?
- Both are casual measurement tools. FLASH blends rapid-vision and speed pressure; this test isolates pure memory practice at settings you control.
- Is this test free?
- Completely free, no signup. Works in any phone or desktop browser.