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… 4 = ?
Step 1: 250 x 4 = 1000
Step 2: 1000 x 20 = 20,000
Division: 4200 ÷ 50 ÷ 60 = ?
Step 1: 4200 ÷ 60 = 70
Step 2: 70 ÷ 50 = 1.4
Take the Next Step with Mental Math Drills
Watch this video (make sure to subscribe!), then jump into free mental math drills to practice for case interview math.
Additional Resources
To improve your fast math skills for case interviews, check out the All Access Pass - a comprehensive consulting prep curriculum that includes our top-rated Mental Math for Consulting course, unlimited Math Drills, 600+ Case Studies, Walkthrough Videos, and more.
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Structure
The following case structure drills will help you take your case start game to the next level. Start strong - it will make or break the case.
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As a general rule, your structure should have 4 data buckets with 3 data points under each bucket. We recommend timing yourself - take no more than 2 minutes to build your structure.
Checking Accounts
Case Type(s): Market Sizing
The Problem
Your client is a provider of financial services to banks in the United States. Estimate how many checking accounts there are in the United States right now.
Bucket …
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Expert Coaching: 10, 1:1 Zoom sessions with MBB coach
All Access Pass: 600+ cases, 28 chatbot cases, 10K+ drills, 12 industry overview primers, 9 courses
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Do I Have to Practice?
Finally, number …
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NOTE: There is an issue with the Safari web browser which may not cause the cases to display properly. Please view in Chrome or Firefox.
Welcome to the MC Case Library! Consider the following as you begin your case interview journey.
If you are a case interview beginner, go through the Case Interview Foundations course to get started
As you work through these practice cases (preferably out loud), pay attention to the specific areas you struggle. Then, use our math, exhibit, structure, or brainstorming drills to further focus your practice.
For 1:1 coaching with an expert, book a 1 …
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… Zoom sessions with MBB coach
All Access Pass: 600+ cases, 28 chatbot cases, 10K+ drills, 12 industry overview primers, 9 courses
Onboarding Calls: 30min career strategy session + cohort interview training
Resume and Cover Letter Edit Add-On in exchange for 2 hours of coaching
Payment Plan available at checkout
$2,250
(9 Spots Remaining)
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By Person By Hour
The second way consulting firms bill clients is by person by hour. A benefit of this model? Firms (Big 4, implementation, tech) can be more flexible based on the client’s budget. Want to save money as a …
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… examples teaching you how to build scenario-based models
Networking for Consulting Bootcamp - 38 video lessons guiding you through the networking process (including templates!)
Resume and Cover Letter Bootcamp - Our proven method to help your resume & cover letter stand out (including templates!)
MC Starter Pack (industry overview) - Your guide to the industry: the main players, types of consulting, life on the job and more
MC Case Library (600+ practice cases with solutions)
200+ video-based framework/brainstorming/math drills
200+ chart/graph and market sizing drills
10K+ web-based mental math and framework drills
13 Industry Primers
28 Chatbot Cases
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… through this free case, we encourage you to grab a pen and paper and simulate the interview scenario. Speak your answers out loud and get accustomed to expressing your thought processes. Remember, a consulting case is as much a verbal exercise as it is a mental one.
Strategy 2: Employing Drill-Based Practice
Our recommendation extends beyond the typical case prep methods; we believe in the effectiveness of drill-based practice. Begin by tackling about five cases similar to the free one provided below. On your subsequent tries, aim to build a stronger structure, brainstorm more intensively, and focus on …