GOAL
Memorise as many number sequences as you can in 60 seconds. Each correct answer scores points and eventually unlocks longer, faster sequences.
RULES
- A number appears briefly — memorise it while the bar drains.
- It disappears. Use the numpad to enter what you saw.
- Tap ✓ to submit. Correct = points. Wrong = next round.
- Every 3 correct answers adds one more digit (max 9).
- Every 5 correct answers the display time shrinks slightly.
SCORING
Correct = digits × 100 pts. A 4-digit answer scores 400 pts; a 7-digit answer scores 700 pts.
Why this sharpens your mind
DIGIT SPAN
Digit span — how many items you can hold in working memory — is one of the strongest predictors of fluid intelligence. Training it transfers to reading, maths, and multi-step problem solving.