Mental Math · 5 reads
Lessons paired with the Mental Math drill room. Read the theory, then run a drill.
Master the mental math techniques that let you calculate market sizes, growth rates, and profitability on the fly - without a calculator.
Beginner
Learn the structured thinking process for estimating market sizes in case interviews, from breaking down the problem to sanity-checking your answer.
Beginner
Practice the cognitive skills tested in McKinsey's digital assessment. Timed data interpretation, mental math, and microbe-averaging exercises modeled after Red Rock Study and Sea Wolf.
Assessment Prep
Learn to read charts fast and extract insights like a consultant. Master line graphs, bar charts, tables, and market maps through real Netflix data analysis.
Intermediate
Master the most common case interview type. Learn how to systematically diagnose profitability issues, build profit trees, analyze revenue and cost drivers, and deliver recommendations that actually work in consulting interviews.
Intermediate