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Courses / Aptitude and consulting

Consulting cases

Case interview practice from first prompt to expert cases: case math, market sizing, structuring, exhibits, full cases and consulting slides.

Start lesson 1Practice interviewTake the assessmentPractice the first unit of every course. No account needed.
60lessons
356checked exercises
22projects, cases and exams
Prepares you for Case interviews

Projects, case studies and mock exams

Case study · IntermediateProfitability case: Copperline Coffee

Work a full interviewer-led profitability case: clarify, structure, read the exhibit, do the math, and recommend.

5 steps · 20 minCase study · IntermediateMarket entry case: Brightwell Pet Foods

Work a full market entry case: structure it, size the market, read the competition, find breakeven, and recommend.

5 steps · 22 minCase study · IntermediatePricing case: Harborline Ferries

Price a new fast ferry from three sides: the cost floor, the value to commuters, and the alternatives, then let demand decide.

6 steps · 25 minCase study · IntermediateGrowth strategy case: Tallis Home

Help a furniture retailer double revenue in five years: lay out the levers, size them, find the gap, and stress-test it.

6 steps · 25 minProject · IntermediateSize a market for a client memo

Build, check and cross-check a market size for an investor memo, then turn it into a revenue figure and the memo’s key paragraph.

7 steps · 40 minCase study · AdvancedAcquisition case: Northgate Tools

Should a tool maker buy a rival? Value it standalone, size the synergies, find the most it should pay, and test the asking price.

6 steps · 25 minCase study · AdvancedOperations case: Meridian Parcel

Find the bottleneck in a parcel hub, size the backlog, and cost the fix against what late parcels cost.

6 steps · 25 minCase study · AdvancedCost cutting case: Halbrook Regional Bank

Take $40 million out of a bank’s costs: size the levers, count the customers a cut could lose, and close the gap.

6 steps · 25 minCase study · AdvancedProduct launch case: Vela Cosmetics

Size a new product’s demand, then find out how much of it simply replaces sales Vela already makes.

6 steps · 25 minCase study · AdvancedWritten case: Corvane Rail

Work a written case from its pack: read the memos and exhibits, run the numbers, write the answer and pick the slide title.

6 steps · 35 minMock exam · AdvancedOnline case

Eight chat-style questions on one case in 15 minutes, with exhibits and a short written answer.

8 questions · 15 minProject · AdvancedBuild the storyline deck

Turn the Copperline findings into a board deck: order the storyline, write the answer and action titles, add the chart, tidy the last slide.

6 steps · 35 minCase study · ExpertDue diligence case: Ashgrove Clinics

A fund weighs buying a physiotherapy chain: clean up the earnings, set the price, build the value plan and test the return.

6 steps · 30 minCase study · ExpertPublic sector case: Larkfield buses

Cut bus trip times on a fixed budget, with no profit to maximize: pick the right metric and compare options on it.

6 steps · 25 minCase study · ExpertCandidate-led case: Ostra Airlines

Lead a full case yourself: choose where to look, ask for the data, read it, size the fix and recommend.

6 steps · 25 minCase study · ExpertTurnaround case: Pemberly Books

A bookstore chain has nine months of cash. Stop the bleeding, free up cash, then plan the turnaround.

6 steps · 25 minMock exam · ExpertCase math

Twelve case math questions in 20 minutes, no calculator, with one clock for the whole set.

12 questions · 20 minMock exam · ExpertExhibits

Ten questions on four exhibits in 18 minutes: growth, margins, mix and a profit bridge.

10 questions · 18 minProject · ExpertBuild a business case

Build a hotel’s business case for a spa step by step: guests, visits, revenue, profit, payback, a downside case and the answer.

7 steps · 35 min

Practice the parts of a consulting case interview the way they happen: an interviewer's prompt, exhibits handed over one at a time, scratch paper and no calculator. Build market sizing driver trees, sort ideas into MECE issue trees, read charts under time, and work full cases from the first question to the recommendation.

The course runs from how a case interview works to expert cases, with practice sets, projects and slides built in an editor that works like PowerPoint: action titles, Align and Distribute, Format Painter, the shortcuts consultants use every day, and waterfall charts. Every answer is checked as you go, with a hint when it's wrong. All companies and figures are fictional.

Interview practice

Explain what you've learned in a full-screen interview. Speak or type, then review your answers against the rubric for your level.

Interview loops by job

Beginner

FreeNo account or card needed. Every lesson in this unit is yours to practice.

Case interview basics

What a case interview is, how it is scored, and how to open one well.

3 lessons
1How a case interview worksWhat happens in a case interview, the two formats you'll meet, and what the interviewer is scoring.5 exercises · 10 minFree
2Clarifying questions and the openingRestate the prompt, ask the two or three questions that change the problem, and skip the ones that only fill time.5 exercises · 12 minFree
Practice setOpenings on new promptsEight quick openings on new prompts: stages, formats, restatements and the questions worth asking.Free

Case math

Percentages, breakeven and large numbers, without a calculator.

4 lessons
4Percentages and growth in case mathWork out shares, growth rates and percentage points in your head, the way a case interviewer expects.5 exercises · 10 minWith a plan
5Breakeven and profit mathUse contribution margin to find breakeven volume, profit after a price change, and payback, without a calculator.4 exercises · 12 minWith a plan
6Large numbers and zerosMultiply and divide millions and billions without losing zeros, and say every answer with its unit.5 exercises · 12 minWith a plan
Practice setMixed case mathTwelve case math questions on fresh numbers, including the edge cases that trip people up.With a plan

Market sizing

Top-down and bottom-up estimates, and how to check them.

4 lessons
8Top-down market sizingBuild a driver tree from a population down to price, pick assumptions you can defend, and get to a number fast.4 exercises · 14 minWith a plan
9Bottom-up sizingSize a business from one unit up: capacity, utilization and price, then add up segments.4 exercises · 14 minWith a plan
10Sanity-check an estimateCatch the assumption that broke: per-person checks, cross-checks and orders of magnitude.4 exercises · 12 minWith a plan
Practice setMixed market sizingEight sizing questions on new markets: trees, replacement cycles, per-household traps and sanity checks.With a plan

Structuring

Issue trees, MECE, and structures built for the case in front of you.

3 lessons
12Issue trees and MECEBreak a client problem into branches with no overlaps and no gaps, then sort the ideas under them.4 exercises · 12 minWith a plan
13Frameworks without memorizingBuild a case structure from a few building blocks and the client’s own words, instead of reciting a framework.4 exercises · 14 minWith a plan
Practice setMixed structuringEight structuring problems on new clients: internal and external splits, processes, profit trees, gaps and overlaps.With a plan

Intermediate

Exhibits and data

Reading charts, tables and market maps fast, and the traps in them.

4 lessons
15Reading charts and tables fastRead titles, units and axes first, find the one number that matters, and ignore the rest.4 exercises · 14 minWith a plan
16Exhibit trapsSpot the truncated axis, the indexed line, the cumulative total and the unit hidden in a footnote before they mislead you.5 exercises · 14 minWith a plan
17Marimekko charts and market mapsRead a market map: column width is segment size, height is share within the segment.4 exercises · 12 minWith a plan
Practice setMixed exhibitsTen exhibit questions on fresh data: growth, margins, shares, waterfalls, market maps and the traps from the unit.With a plan

Business math for cases

Unit economics, mix effects and the time value of money, interview style.

4 lessons
19Unit economics: CAC, LTV and paybackWork out what a customer is worth, what it costs to win one, and how long until they pay it back.5 exercises · 14 minWith a plan
20Weighted averages and mix effectsAverage prices, rates and margins correctly, and explain results that move because the mix moved.5 exercises · 14 minWith a plan
21NPV and payback, interview stylePayback, discounting with given factors, and perpetuities: the time-value math a case can throw at you.5 exercises · 15 minWith a plan
Practice setMixed business mathTen mixed questions on unit economics, weighted averages and time value, on fresh numbers.With a plan

Synthesis and driving the case

Brainstorming with structure, leading a candidate-led case, and closing with an answer.

4 lessons
23Structured brainstormingAnswer "what could the client do?" with ideas grouped into clear buckets, not a long list.5 exercises · 14 minWith a plan
24Driving a candidate-led caseLead the case: propose where to look, ask for data that tests a hypothesis, and move on from dead ends.5 exercises · 14 minWith a plan
25Synthesis: the recommendationClose a case the way a partner wants to hear it: the answer first, two or three numbers, a risk and a next step.4 exercises · 12 minWith a plan
Practice setMixed synthesisEight closing moments from different cases: openings, supporting facts, a no-go and a conditional answer.With a plan

Full cases I

Complete interviewer-led cases, one stage per step, and a market sizing project.

5 lessons
Case studyProfitability case: Copperline CoffeeWork a full interviewer-led profitability case: clarify, structure, read the exhibit, do the math, and recommend.With a plan
Case studyMarket entry case: Brightwell Pet FoodsWork a full market entry case: structure it, size the market, read the competition, find breakeven, and recommend.With a plan
Case studyPricing case: Harborline FerriesPrice a new fast ferry from three sides: the cost floor, the value to commuters, and the alternatives, then let demand decide.With a plan
Case studyGrowth strategy case: Tallis HomeHelp a furniture retailer double revenue in five years: lay out the levers, size them, find the gap, and stress-test it.With a plan
ProjectSize a market for a client memoBuild, check and cross-check a market size for an investor memo, then turn it into a revenue figure and the memo’s key paragraph.With a plan

Advanced

Consulting slides

The slides consultants build every day, in a PowerPoint-style editor.

7 lessons
32Action titles that state the so-whatTurn topic labels into slide titles that state the takeaway: one message, with a number, in two lines or fewer.4 exercises · 12 minWith a plan
33Align and format a slideFix a messy consulting slide with Align, Distribute, Format Painter and the PowerPoint shortcuts that make it fast.5 exercises · 15 minWith a plan
34Build a chart slideInsert a column chart and a waterfall, type the data, sort it, and title it with the so-what.4 exercises · 15 minWith a plan
35Executive summary slidePut the answer in the title and two to four supporting points underneath, each with the number that proves it.5 exercises · 15 minWith a plan
362x2 matrix slidePlace items on a two-by-two matrix by reading the axes, and avoid the classic slips: swapped axes and items on the line.4 exercises · 14 minWith a plan
37Tables that read at a glanceRight-align numbers, cut columns nobody needs, and highlight the one row the title is about.5 exercises · 15 minWith a plan
Practice setMixed slidesEight slide fixes on a new deck: titles, alignment, fonts, a 2x2, a table, bullets and a chart.With a plan

Full cases II

Acquisition, operations, cost cutting and product launch cases.

4 lessons
Case studyAcquisition case: Northgate ToolsShould a tool maker buy a rival? Value it standalone, size the synergies, find the most it should pay, and test the asking price.With a plan
Case studyOperations case: Meridian ParcelFind the bottleneck in a parcel hub, size the backlog, and cost the fix against what late parcels cost.With a plan
Case studyCost cutting case: Halbrook Regional BankTake $40 million out of a bank’s costs: size the levers, count the customers a cut could lose, and close the gap.With a plan
Case studyProduct launch case: Vela CosmeticsSize a new product’s demand, then find out how much of it simply replaces sales Vela already makes.With a plan

Written cases and online tests

Case packs, chat-style online drills, a timed mock, and a storyline deck project.

5 lessons
43Written cases and case packsTriage a case pack, spot the document that corrects another, and write an answer that stands on its own.4 exercises · 15 minWith a plan
45Chat-style online case drillsPractice the skills chat-style online case tests check: reading a prompt fast, pulling the right numbers, and answering in a box.5 exercises · 15 minWith a plan
Case studyWritten case: Corvane RailWork a written case from its pack: read the memos and exhibits, run the numbers, write the answer and pick the slide title.With a plan
Mock examOnline caseEight chat-style questions on one case in 15 minutes, with exhibits and a short written answer.With a plan
ProjectBuild the storyline deckTurn the Copperline findings into a board deck: order the storyline, write the answer and action titles, add the chart, tidy the last slide.With a plan

Expert

Expert cases

Due diligence, public sector, candidate-led and turnaround cases.

4 lessons
Case studyDue diligence case: Ashgrove ClinicsA fund weighs buying a physiotherapy chain: clean up the earnings, set the price, build the value plan and test the return.With a plan
Case studyPublic sector case: Larkfield busesCut bus trip times on a fixed budget, with no profit to maximize: pick the right metric and compare options on it.With a plan
Case studyCandidate-led case: Ostra AirlinesLead a full case yourself: choose where to look, ask for the data, read it, size the fix and recommend.With a plan
Case studyTurnaround case: Pemberly BooksA bookstore chain has nine months of cash. Stop the bleeding, free up cash, then plan the turnaround.With a plan

Fit and behavioral interviews

STAR answers, motivation answers and the fit questions that come up most.

3 lessons
52Behavioral answers with STARAnswer "tell me about a time" questions in four parts: situation, task, action, result.5 exercises · 14 minWith a plan
53"Why consulting" and "why this firm"Give two or three distinct reasons, each backed by something you did, and make "why this firm" specific.4 exercises · 12 minWith a plan
Interview setFit interview questionsEight common fit questions, from leadership to failure, answered in STAR structure.With a plan

Interview practice and mock exams

Question sets from easy to hard, and timed mock exams.

4 lessons
Interview setCase math interview questionsNine case math questions as interviewers ask them, three easy, three medium and three hard.With a plan
Interview setMarket sizing interview questionsSix market sizing questions from easy to hard: choose the structure, then estimate.With a plan
Mock examCase mathTwelve case math questions in 20 minutes, no calculator, with one clock for the whole set.With a plan
Mock examExhibitsTen questions on four exhibits in 18 minutes: growth, margins, mix and a profit bridge.With a plan

Models in a case

Quick models, sensitivity and a full business case built step by step.

2 lessons
59Quick models in a caseBuild a small profit model in your head or on paper, then test it: sensitivity, scenarios and breakeven.4 exercises · 15 minWith a plan
ProjectBuild a business caseBuild a hotel’s business case for a spa step by step: guests, visits, revenue, profit, payback, a downside case and the answer.With a plan

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