A 2–Minute Journey into Your Computational Brain.
Add, Subtract, Multiply, Divide, Win, Lose, Improve, Impress.
Pick how long you want to play. Practice rounds never affect your high scores or the global leaderboard — they are just for warming up.
Choose the rules. You can come back here any time.
Same questions, same clock. No peeking at Player 1's answers!
Play a round and your latest result will live here.
The clock is stopped. Take a breath.
Your unfinished score will not be saved.
Head to head is two players on this one device. Only one account is signed in here, so there is no way to tell who earned which score — neither score is recorded. No leaderboard, no history, and this round cannot be shared as a challenge.
To play someone and have both scores count, play solo and send them the challenge link afterwards.
Easy starts at Level 1, Medium at Level 3, and Hard at Level 5. Harder levels also pay more per answer — Easy ×1, Medium ×1.5, Hard ×2.2 — so every difficulty competes on the same leaderboard.
Ranked — a 2-minute solo round from Play, Daily challenge, or a challenge link. Saved to your history and the leaderboard while you are signed in. Nothing else is saved.
Practice — 30 seconds to 5 minutes, so the scores are not comparable with ranked ones.
Head to head — two players on one device. Only one account is signed in, so there is no way to tell who earned which score, and neither is saved.
Share this challenge appears on ranked rounds only: the link carries your score as the target, and whoever opens it always plays a fixed 2 minutes, so a practice or head-to-head target would be unfair.
They face your exact questions on their own device, under their own account — so their score counts as theirs. That is how to compete and have both scores land on the board.
Pick a name for the leaderboard. Everything you have scored on this device comes with you.
No password, ever. Your email is only used to sign you in — it is never shown on the leaderboard.
You are signed in and your scores are saved to the cloud.
This is the only thing other players see. Two to sixteen characters.
You opened this link in a different browser to the one that requested it. Enter the address you used and we will finish signing you in.