How close can you get?
Calculus, typed out by hand. No multiple choice, no hints, no partial credit, no mercy. Five minutes against the clock, as long as you like against a curve that keeps getting worse, or one graph a day to name.
Try one. No account.
d2So far
- players
- 936players
- countries
- 94countries
- problems solved
- 53,932problems solved
More than a worksheet with a timer
Challenge a friend
Send them your exact problems
Finish a Sprint, send the link. They get the same problems, the same five minutes, and no account to make. Then it’s you against them, side by side.
You
16
Your friend
14
Squiggles
Everything you play earns dx
Open packs, collect all 36 calculus creatures. Some are one in ten thousand. Your first five packs are free.
What you get out of it
Bragging rights
A title almost nobody holds, a league you climb against real people, and a card of your run to post. Everyone can see who is ahead.
Real practice
Typed answers, no multiple choice, no partial credit. After every run you see what you missed, the right answer, and whether it was the maths or the typing.
Numbers on yourself
Levels, streaks, personal bests and the hardest problem you have ever solved. Proof you are getting better, not a feeling.
Leagues
Every Monday you are put in a group of ten. Whatever you solve that week is your score; the top of the group moves up, the bottom drops. Ten leagues, and nobody has reached the last one yet.
For teachers
A live calculus game for your class
Put a code on the projector. Students join on their phones with a nickname, no accounts. Race, Teams or Gold Rush on limits, derivatives or integrals, then see which problems the class missed.
