Solve, score points, and beat
the clock with Calculi!
Enter a duel against time! Solve as many equations as possible before the timer runs out, boost your score multiplier, and prove you’re the fastest at firing the right answers.
Find the answer
Solve classic equations as fast as possible to rack up points.
Find the missing number
Complete the equation with the correct digit before the timer ends.
Find the right sign
Choose the correct operator to make the equation true. Think fast!
Beat the clock
Every second counts: the faster you answer, the higher your multiplier goes!
FAQ – Everything you need to know about Calculi
What is Calculi?
Calculi is a fast-paced mental math game where your goal is to solve as many equations as possible before time runs out. The faster you answer, the more points you earn!
How do I score points?
Each correct answer earns you points. Answer quickly to increase your multiplier and make your score climb even faster!
What happens if I make a mistake?
A wrong answer makes you lose points and may lower the game’s difficulty. Stay focused — every mistake counts!
Does the game get harder?
Yes! With each correct answer, the difficulty increases: equations become more complex, and the timer seems to speed up. That’s when your brain really kicks in!
What types of calculations are there?
Three types of challenges await you:
Find the correct answer
Find the missing number
Find the sign that completes the equation
