Ten seconds. Your move.
Ten rounds of mental math, getting trickier as you go. Give it your best guess.
SMALL GAME. BIG BRAIN ENERGY.
A little mental math. A little instinct.
Ten seconds to make it count.
Offline by design. No ads. Just you and the numbers.
THE BEAUTY IS IN THE ALMOST
Ten rounds of mental math, getting trickier as you go. Give it your best guess.
Close answers earn points. Lock in sooner for a multiplier of up to ×2.
Exact answers score 20 base points. Chase up to 40 a round, and a new personal best.
LESS NOISE. MORE NUMBERS.
No account to create. No ads to skip. No connection needed to play. Your personal best stays on your device.
Your score is yours. So is your privacy.FOR YOUR NEXT SPARE MINUTE
Sumwhat for iPhone, iPad and Android. Coming soon.
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