Make the math the easy part.
Master the frameworks behind complex market sizing questions without freezing under pressure.
Case interview prep shouldn't feel like a math test. Ballpark Math turns intimidating estimation problems into interactive, bite-sized puzzles. Learn to deconstruct the problem, select the right components, and build rock-solid frameworks with total confidence.
How it works
Read
A real market-sizing prompt - for example, "Annual rides on the Mexico City metro."
Pick
Tap the components that should be in your back-of-envelope estimate. Ignore the noise.
Learn
Per-component feedback on every answer - see exactly which you missed and why.