Case interview blog

math-and-quant

Michigan Ross Case Book: 14 Cases and Formula Guide

Inside the 14-case 2019 Michigan Ross case book: its formula primer, industry primers, and a source-backed American Bank ATM profitability example.

math-and-quant

Numerical Reasoning Test for Consulting 2026: Format & Prep

Which provider you will face, question types and weighting, the score consulting firms want, mental-math hacks.

math-and-quant

NPV and Discounting in Case Interviews: Shortcut Guide 2026

Handle NPV and discounting in case interviews fast: the perpetuity shortcut (CF / r), the 10% default rate, no-calculator mental math.

math-and-quant

Math (2026)

Math (2026), a 2026 candidate guide covering format, what interviewers score, a worked example, and a practice plan on CoachNed.

math-and-quant

Market Sizing Practice Questions and Solutions (2026)

Practice market sizing with a live AI-graded question, worked solutions, a reference-number cheat sheet, sanity checks, and a two-week drill plan.

math-and-quant

Best Free AI for Case Math Practice + Live Graded Drill

Compare five free AI tools for case math practice, then run a live graded drill. Includes worked examples, copy-paste prompts, and mental-math shortcuts.

math-and-quant

Case Interview Math Tips: A Calm, Repeatable Process (2026)

Twelve case interview math tips: the four-step Verbalize-Calculate-Sense-check-Interpret loop, the round-first rule, unit tagging.

math-and-quant

Finance Case Interview: Structure, Math, and Worked Examples (2026)

Finance case interviews reward unit economics over frameworks. Here's the math, the 4 case types, and 2 worked examples with real ROE and NIM numbers.

math-and-quant

Market Sizing Questions with Answers: 20 Examples + PDF Practice (2026)

20 market sizing questions with answers from McKinsey, BCG, and Bain-style interviews. Includes worked solutions, formulas, assumptions, and PDF practice paths.

math-and-quant

Break-Even Analysis for Case Interviews: Formula, Worked Examples, and When to Use It (2026)

The complete break-even guide for case interviews: the formula, contribution margin, break-even price, margin of safety, and five fully worked numeric examples with the actual arithmetic and the sanity-check that wins offers.

math-and-quant

ZS Associates Case Interview: Cross-Industry Quantitative Cases and Prep Guide (2026)

ZS Associates publishes practice cases across airlines, pharma, and consumer goods. Learn the quantitative case approach, worked examples, and prep plan.

math-and-quant

Consulting Math Formulas: The Case Interview Reference (With Worked Examples)

Every consulting math formula for case interviews: margins, CAGR, break-even, ROI, NPV, market share, and unit economics. Each one with a worked example, when to use it, and the mistake that costs offers.

math-and-quant

Case Interview Math: Mental Shortcuts to Calculate Faster

Mental math shortcuts for case interviews: CAGR rules, percentage tricks, large-number estimation, and 10+ timed drills to build MBB-level speed.

math-and-quant

Case Interview Math Practice: 30 Drills, Questions, and Solutions

30 case interview math drills with step-by-step solutions across percentages, break-even, CAGR, market sizing, and profitability. Built for consulting math practice, MBB interviews, and repeatable drill reps.

math-and-quant

Mental Math for Case Interviews: Speed Drills, Tricks, and Mistakes

Get faster and more accurate at case interview math. Rounding, shortcuts, and drills for percentages, multiplication, and sanity checks, without a calculator.