Watch each flash, add in your head, then type the total. About 8 rounds. Enter to submit.
How it works
Watch each flash, add in your head, then type the total. About 8 rounds. Enter to submit. Mental-abacus training studies use long practice. One web sum is not a fluid-IQ gain and not a clinical score.
➗ Mental Math Speed Test🧾 Digit Span Test — Forward & Backward⚖️ Dot Compare Lite — Which Cloud Has More5️⃣ Number Stroop Lite — Value vs Ink Size
❓ FAQ
Do I need a real abacus?No. The beads are a visual hint. You can just add the numbers.
Will this raise my IQ?Unlikely as far transfer. You may get faster at this toy. That is not a deviation IQ.
How many addends?It starts short and can grow. Still a handful of numbers, not a contest marathon.
📅 Last updated: 2026-08-27 · ✔ Reviewed by the All-Lifes editorial team · About · Methodology