SUM

14

3

5

6

FLASH MENTAL

Numbers flash one at a time — sum them in your head before they vanish.

1v1Ranked60s on the clockMath group

Your Math rating

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Rank

Unranked

1v1 · ranked

Race a real player

Both players get the same sequences. Numbers appear one at a time and disappear — type the total from memory. Sequences get longer and flash faster as the match goes on. Most correct sums wins.

Play 1v1 →

Practice (timed) →

A 60-second solo run — beat your personal best. No rating.

How to play →

Learn the rules in under a minute.

Strategies →

Techniques to solve faster.

Leaderboard →

Where you stand on the Math ladder.