Case Interview Math Guides
In-depth articles, formulas, and study plans to master consulting interview math.
⚡ Quick Math Patterns
Full Math Guide →⭐ Featured Cheatcodes
Case Interview Math Formulas Cheat Sheet [2025]
Free cheat sheet with every formula you need: margins, breakeven, CAGR, ROI. Includes worked examples and printable PDF for McKinsey/BCG/Bain prep.
Case Interview Math: Complete 2025 Guide
Master every formula & technique for consulting case math. Free drills, step-by-step examples, and shortcuts for McKinsey, BCG & Bain interviews.
Mental Math for Consulting: Speed Tricks That Work
Calculate faster without mistakes in case interviews. Proven shortcuts for percentages, multiplication & division—with free practice exercises.
All Guides (15 more)
Market Sizing Cheat Sheet: Numbers to Memorize
Every stat you need for market sizing: US/world population, economic benchmarks, business metrics. Printable reference + worked examples.
50 Case Math Questions with Full Solutions [2025]
The ultimate case math problem bank. 50 questions on profitability, breakeven, growth, ROI & market sizing—all with step-by-step solutions.
ROI & Payback Period: Case Interview Guide
Master ROI and payback calculations for consulting cases. Simple formulas, 5 worked examples, and practice questions—just like McKinsey, BCG & Bain.
Market Sizing Math: Frameworks & Key Numbers
Nail market sizing questions with proven frameworks. Top-down vs bottom-up methods, key stats to memorize, and sample calcs with sanity checks.
Data Interpretation in Case Interviews: Charts & Math
Read charts like a consultant. Learn the SCAN method to analyze exhibits fast, pick the right calculations, and avoid common data pitfalls.
Fermi Estimation for Case Interviews: Quick Guide
Make smart assumptions fast. Fermi decomposition tactics, key benchmarks to memorize, and rounding rules that won't break your case answer.
McKinsey Case Math: What to Expect + 7-Day Plan
How McKinsey tests case math differently. Interviewer-led questions, chart-heavy exhibits, speed targets, and a 7-day training plan to get ready.
BCG & Bain Case Math: Examples + 14-Day Plan
How BCG and Bain test case math vs McKinsey. Candidate-led examples, common question patterns, and a 14-day practice plan with free drills.
Breakeven & Profitability: Case Interview Formulas
Every breakeven and profitability formula for cases. Contribution margin, profit bridges, margin analysis—with worked examples and practice Qs.
Case Math for Non-Business Backgrounds: Quick Start
Engineering, science, or humanities? Learn the minimum business math for cases in 10 days. Translate formulas to plain English + fast ramp-up plan.
14-Day Mental Math Plan for Case Interviews
Day-by-day mental math schedule to get case-ready in 2 weeks. Daily drills, difficulty progression, and exact benchmarks. Free tools included.
Growth Rate & CAGR: Case Interview Shortcuts
Calculate growth and CAGR in your head. Rule of 72, quick approximations, and when to use each method—with practice exercises.
15 Case Math Mistakes That Kill Offers (+ Fixes)
The exact mistakes that fail smart candidates. Wrong base, revenue vs profit confusion, silent calculations—concrete examples and how to fix each.
30 Case Math Practice Questions (with Answers)
Realistic case math problems with step-by-step solutions. Profitability, breakeven, growth, ROI—timed practice like real MBB interviews.
10 Classic Consulting Brain Teasers (with Answers)
The most common brain teasers from McKinsey, BCG & Bain interviews. Step-by-step solutions, approach strategies, and free practice tool.
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