Expert with best answer

An (Jack)

100% Recommendation Rate

26 Meetings

101 Q&A Upvotes

USD 219 / Coaching


I am an undergraduate looking to study and prep for case interviews especially in management consulting.

I would like some business case interview questions from the Big 3 or the Big 4 companies which has also a recommended or just an guideline answer for each of the questions. It would be great if anyone could

6 answers

  • Upvotes
  • Date ascending
  • Date descending

Originally answered:

Which resources are best?

Best Answer
An (Jack)
replied on Jun 04, 2018
Google Strategy Manager | Ex- BCG Consultant | References Available
Book a coaching with An (Jack)

100% Recommendation Rate

26 Meetings

101 Q&A Upvotes

USD 219 / Coaching

Hi Piers,

I think Vlad's answer is spot on. Just a short note on when you are practicing cases

1. Resources: Consulting case 101 ( is a great resource for practice cases and written solutions. There are also great resources on PrepLounge in the practice case section

2. Approach: Depending on how much time you have, I would recommend starting with Market Sizing cases first and trying to become quite proficient at those.

  • It is a great way to practice thinking structured consistently throughout a case, as well as practicing mental maths. Both common pitfalls for candidates.

3. Make a schedule for live practice: Nothing beats doing practice live. Make a 2-4 week practice schedule and plan ahead to find peers as partners. I think it helps to have a professional mock interview after 5-10 practice sessions with friends or peers, then repeat the cycle. I think you get most of the relevant feedback and advice after 2-3 sessions, any more and the marginal benefit tapers out. Also, be sure towrite down the types of feedback you have been getting from your partners and make sure to ask your mock interviewer specific questions on the best way to address them.

Hope that is helpful!

Originally answered:

Which resources are best?

replied on Jun 04, 2018
McKinsey / Accenture / Got all BIG3 offers / More than 300 real MBB cases / Harvard Business School
Book a coaching with Vlad

97% Recommendation Rate

365 Meetings

5,412 Q&A Upvotes

USD 229 / Coaching


I recommend the following approach:

1) Start with "Case in point" book - you can download this book for free everywhere. It's not the best guide on how you should approach the cases, however, it will give you the basic understanding.

2) Start practicing cases with partners here or find them locally

3) Practice fast math

  • Learn how to multiply double digit numbers (
  • Learn the division table up to 1/11 (i.e. 5/6 = 83.3)
  • Learn how to work with zeros (Hint: 4000000 = 4*10ˆ6)
  • Use math tools (Mimir math for iOS), Math tool on Viktor Cheng website to practice

3) Purchase and read Viktor Cheng Book (Amazon Kindle store) and listen to LOMS (his website). I recommend to reread the book and listen to LOMS every 15 cases. Every time, having more experience, you’ll be finding something new.n

4) Every 10-15 cases revisit the previous cases and think how you would structure them differently now having the new experience and having solved the new types of cases

5) Build business judgment. Read about different industries and functions. I strongly recommend practice drawing structures for each industry - profitability, value chain, etc . Then I will switch to getting functional knowledge and key concepts in Marketing (Brand and trade marketing tools, etc), Supply chain (Ops metrics like cycle time and throughput time, distribution and delivery specifics, etc), Finance (Basic Accounting and Valuation). Good sources might be:

  • Books - one good book about airlines with numbers and industry analysis can give you all needed industry knowledge
  • Company reports, equity reports, etc - usually have a good overview of company and industries.One of the best sources to prepare
  • HBS cases - quite useful, but not sure if lot's of them available publically. Probably worth buying

! Important 1: practice the tests / written cases for the relevant companies. (

! Important 2: don't forget about the FIT interview part. Crafting you stories and backups stories will require a couple of weeks!


Hi Vlad, thank you so much for your detailed response. Your concise step-by-step process is exactly the direction I needed. Thanks again! — Piers on Jun 04, 2018 (edited)

replied on Feb 07, 2018
Former BCG decision round interviewer with 300+ real interviews in 8 years
Book a coaching with Andrea

100% Recommendation Rate

118 Meetings

756 Q&A Upvotes

USD 269 / Coaching

Would start with the "classic" prep books: case in point by cosentino, victor Chang and then all PDF books from consulting clubs of MBAs you can get your hands on (hint: look at previous questions here asking for materials to find useful links).

then I would use the websites of consultancies to get their case and test examples.

finally I would first ask mock interviews to current employee as a key step in your preparation (especially if you know any, but ok tocold write LinkedIn messages). And then for the ultimate real experience I would suggest to book a couple of sessions with experts here. I would look for and choose the ones who were interviewers of your consultancy of choice and that had the most recent experience.

hope it helps,


Content Creator
replied on Feb 07, 2018
#1 Expert for Coaching Sessions (2.600+) | 1.100+ Reviews with 100% Recommendation Rate | Ex BCG | 6+ Years Coaching Experience
Book a coaching with Francesco

100% Recommendation Rate

2,602 Meetings

2,837 Q&A Upvotes

USD 319 / Coaching

Hi Jae Hun,

you can find below some steps for the preparation and related resources to use that can offer case interview questions:

  1. General understanding of the process: get a general idea on what a consulting interview is about
    • Resources: Case in Point, Victor Cheng free videos, PrepLounge Resources section
  2. Learning structures and main fit questions + define preparation plan
    • Resources: Victor Cheng Look Over My Shoulder, MBA Handbooks, PrepLounge Resources section, Expert sessions
  3. Practicing with live partners to apply knowledge and improve communication
    • Resources: PrepLounge P2P interviews, friends preparing for consulting
  4. Final review to eliminate the last mistakes
    • Resources: PrepLounge P2P interviews (experienced users), friends working in consulting, Experts sessions

If you are interested in booking expert sessions, I would strongly recommend NOT to wait until the last few days before the interview to book them. Rather, it could be very useful to have a session after a minimum of 5-10 cases or 10-20h of preparation on your own (step 2 above), as a professional expert can also help you to refine your preparation plan. Once defined that, if feasible you can have additional sessions towards the end of your prep plan as a final review.



Anonymous replied on Feb 07, 2018

Hey Jae,

Fully agree with Andrea's suggested steps!

Let me just add that you can also find solved cases in PrepLounge itself (some for free, some it seems you will need to go premium!):

Good luck for your prep process



replied on Jan 08, 2016
Bain / Formerly A.T. Kearney /INSEAD
Book a coaching with Francisco

100% Recommendation Rate

5 Meetings

4 Q&A Upvotes

USD 219 / Coaching

Hi Kevin,

You did not state exactly at what phase are you (newly hired, little experience, recruiting) nor your level (business analyst or associate). Given this I will just focus on what I believe are the critical basic skills for the job. If you master the first and feel comfortable with the second, you're already in a good position.

1. Analytical skills: mastering the problem structuring, the development of analysis within the structure and the building of conclusions and recommendations based on those analysis should be your focus. For this the Case interview secrets book from Victor Cheng is very good. It teaches you the problem solving process in a very practical and straightforward manner. In addition you should practice solving cases with partners. This may seem obvious but even after being hired if you sometimes feel uncomfortable or lost in projects this exercise is very valuable.

2. Analytical tools: learning the most commonly used tools to perform analysis is easy and will save you a lot of time. By basic tools I mean learning to use some features of Microsoft excel such as pivot tables and functions like vlookup, if, index, match, sumif,... Google is your friend here

Additional skills such as written communication or project management are also very important but easier to develop on the job and with multiple high quality trainings provided by those companies.

I hope this was a help, if you want to clarify your situation I can try to be more specific.



Related BootCamp article(s)

Interviewer-Led vs Candidate-Led cases

Case Interviews can be led by the candidate or by the interviewer: In Candidate-led cases the main challenge is the structure. In Interviewer-led cases the main challenge is to adapt quickly

Related case(s)

Bain case: Asian lubricants producer

Solved 104.2k times
4.7 5 27503
| Rating: (4.7 / 5.0)

LubricantsCo, a very successful Asian premium producer of lubricants in their native region, would like to further increase their revenue and profit. The product range ranges from lubricants in the automotive sector (e.g. motor and gear oil) to industrial applications (e.g. fats, heavy-duty oils). ... Open whole case

Deloitte Consulting case: Footloose

Solved 57.5k times
4.5 5 12718
| Rating: (4.5 / 5.0)

Duraflex is a German footwear company with annual men’s footwear sales of approximately €1 b. They have always relied on the boot market for the majority of their volume. In this market they compete with three other major competitors. In the fall of 2013, Badger – one of Duraflex’s competitiors – ... Open whole case

Roland Berger case: Light on!

Solved 54.3k times
4.6 5 13765
| Rating: (4.6 / 5.0)

LumCO, a company producing injection-molded components for lighting applications, has operated successfully in its native European market. The company wants to open up one production facility each in China and the United States and establish their own distribution network in both countries to serve ... Open whole case

Bain Case: Old Winery

Solved 40.7k times
4.4 5 1060
| Rating: (4.4 / 5.0)

You have inherited the “Old Winery” from your grandfather, a winery which has been family owned for five generations and can be dated back to the 16th century. Half of the eleven hectares are used to grow white grapes, the other half to grow red grapes. They are grown in the conventional way, i.e. ... Open whole case

McKinsey Questions

Solved 33.3k times
4.5 5 835
| Rating: (4.5 / 5.0) |
Difficulty: Intermediate | Style: Fit interview | Topics: Personal fit

Tell me of a situation where you had an opinion and no one seemed to agree with you. What was your goal when you decided to join university / work / clubs / a sports team? Did you have a goal that you were not able to reach? What did you do? What do you want to be remembered for and how are you a ... Open whole case