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Consulting Q&A – Ask Questions about Your Career

In this overview, you will find all the questions asked so far by the PrepLounge community. Anyone can ask questions and write answers. Our coaches are also happy to share their expertise. If you like an answer, give it an upvote so that it rises to the top. Here you can also find our guidelines and FAQs for the Consulting Q&A.

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Strategy& and Middle East Case Studies Structure

Case Calculations Case Interview case studies Interview mental math Middle East strategy& strategyconsultants Structure structuring
Most recent answer on Apr 11, 2024
The best answer (on Apr 10, 2024) is from:
Francesco
Expert
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Francesco
Expert
 gave the best answer on Apr 10, 2024
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Hi there, Q: In market sizing questions, do they provide you with the data? Also, in other types of cases, are there questions and you have to solve them?  If you get a market sizing questions, you will have to find a w ... (read entire answer)
3
Answers
89
Views
30
Total Upvotes
on Apr 11, 2024 on Apr 11, 2024
Last Activity

Ondemand Assessment

consulting MBB mental math Mentorship
Most recent answer on Mar 15, 2024
The best answer (on Mar 15, 2024) is from:
Cristian
Expert
#1 rated MBB & McKinsey Coach
Cristian
Expert
 gave the best answer on Mar 15, 2024
#1 rated MBB & McKinsey Coach
Haven't seen examples of the test yet.  So if I were you I would reach out to the recruiter to ask for more details on the structure of the test and explicitly request test samples. They often share those. The more info ... (read entire answer)
2
Answers
133
Views
17
Total Upvotes
on Mar 15, 2024 on Mar 15, 2024
Last Activity

Casing Maths

mental math
Most recent answer on Dec 01, 2023
The best answer (on Aug 24, 2023) is from:
Antonello
Expert
McKinsey | NASA | top 10 FT MBA professor for consulting interviews | 6+ years of coaching
Antonello
Expert
 gave the best answer on Aug 24, 2023
McKinsey | NASA | top 10 FT MBA professor for consulting interviews | 6+ years of coaching
Hi, In interviews the aspect which causes more errors is pressure: start to solve calculations with strict time constraint. For longer formulas always share the calculation structure with interviewer before starting to ... (read entire answer)
9
Answers
429
Views
30
Total Upvotes
on Dec 01, 2023 on Dec 01, 2023
Last Activity

Materials for practicing CONCEPTUAL Case Math

case math mental math
Recent activity on Oct 16, 2023
Anonymous B gave the best answer on Sep 30, 2020
sounds like you are doing the right thing. My advice is to revisit past cases with complex maths structuring to remind yourself how you have done it in the past. Then in the interview you can see if techniques you have ... (read entire answer)
6
Answers
3.3 k
Views
19
Total Upvotes
on Oct 16, 2023 on Oct 16, 2023
Last Activity

Best apps for mental maths???

apps Case Maths maths mental math mental maths apps
Recent activity on Oct 16, 2023
The best answer (on Jul 08, 2019) is from:
Vlad
Expert
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Vlad
Expert
 gave the best answer on Jul 08, 2019
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Hi, You can use preplounge tool, Viktor Cheng tool, Mimir Math on iOS Also, I recommend practicing the following: Learn how to multiply double digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJHo) Learn ... (read entire answer)
7
Answers
32.3 k
Views
10
Total Upvotes
on Oct 16, 2023 on Oct 16, 2023
Last Activity

Mental Math - Calculating Percents (Fraction to Decimal)

mental math percentage
Most recent answer on Oct 16, 2023
The best answer (on Oct 14, 2023) is from:
Hagen
Expert
#1 Bain coach | >95% success rate | interviewer for 8+ years | mentor and coach for 7+ years
Hagen
Expert
 gave the best answer on Oct 14, 2023
#1 Bain coach | >95% success rate | interviewer for 8+ years | mentor and coach for 7+ years
Hi there, I would be happy to share my thoughts on your question: First of all, using common factors to simplify numbers may help a lot. For instance, if you see numbers like 21 and 87, knowing they are both divisible b ... (read entire answer)
5
Answers
433
Views
40
Total Upvotes
on Oct 16, 2023 on Oct 16, 2023
Last Activity

Mental math

case math mental math
Most recent answer on Oct 06, 2023
The best answer (on Oct 06, 2023) is from:
Francesco
Expert
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Francesco
Expert
 gave the best answer on Oct 06, 2023
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Hi there, Q: Any blogs / websites etc to get mental math tips? You can always write down the math, unless the interviewer explicitly asks to do the math in your head, which is quite rare. For this reason, I would recomm ... (read entire answer)
6
Answers
475
Views
56
Total Upvotes
on Oct 06, 2023 on Oct 06, 2023
Last Activity

Preparing from the basics

1stround BCG Case Interview BCG McKinsey and Bain fast math Framework hypothesis mental math numerical Structure
Most recent answer on Mar 10, 2023
The best answer (on Mar 08, 2023) is from:
Francesco
Expert
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Francesco
Expert
 gave the best answer on Mar 08, 2023
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Hi there, Q: I am looking for advice on how to prepare.  In terms of general preparation, I would recommend the following: Define a calendar for your preparation. Identify how many hours you have before your interview a ... (read entire answer)
5
Answers
667
Views
61
Total Upvotes
on Mar 10, 2023 on Mar 10, 2023
Last Activity

Mental Math at Preplounge

mental math mental maths apps
Most recent answer on Jan 31, 2023
The best answer (on Jan 28, 2023) is from:
Hagen
Expert
#1 Bain coach | >95% success rate | interviewer for 8+ years | mentor and coach for 7+ years
Hagen
Expert
 gave the best answer on Jan 28, 2023
#1 Bain coach | >95% success rate | interviewer for 8+ years | mentor and coach for 7+ years
Hi Uzma Khan, I think this is an interesting question that may be relevant for many people. I would be happy to share my thoughts on it: It sounds like you may be experiencing a technical issue with the mental math reso ... (read entire answer)
5
Answers
528
Views
20
Total Upvotes
on Jan 31, 2023 on Jan 31, 2023
Last Activity

Help! - How can I improve my math skills?

Math problem mental math quantitative
Most recent answer on Jan 22, 2023
The best answer (on Jan 20, 2023) is from:
Francesco
Expert
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Francesco
Expert
 gave the best answer on Jan 20, 2023
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Hi there, Q: My written math skills are ok but I have difficulties with mental math and basically feel not confident and secure in the quantitative field. How can I improve my skills? It is difficult to answer without a ... (read entire answer)
6
Answers
732
Views
52
Total Upvotes
on Jan 22, 2023 on Jan 22, 2023
Last Activity

Maths efficiency in case

case math mental math
Most recent answer on Jan 16, 2023
The best answer (on Jan 16, 2023) is from:
Cristian
Expert
#1 rated MBB & McKinsey Coach
Cristian
Expert
 gave the best answer on Jan 16, 2023
#1 rated MBB & McKinsey Coach
Hi there,  What you can always do is to divide the denominator further.  Basically: 6090 / 12 = 6090 / 4 * 3 = 6090 / 2 * 2 * 3 = 3045 / 2 * 3 = 1015 / 2 = 507.5. Happy to share a few additional resources on improving m ... (read entire answer)
5
Answers
495
Views
54
Total Upvotes
on Jan 16, 2023 on Jan 16, 2023
Last Activity

I feel completely out of place. Any advice?

MBB mental math Personal Life
Most recent answer on Nov 25, 2022
The best answer (on Nov 23, 2022) is from:
Ian
Expert
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Ian
Expert
 gave the best answer on Nov 23, 2022
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Hi there, Absolutely this question is allowed! And, congrats on getting MBB…this is a huge achievement in-and-of-itself! Please remember that everyone feels like an imposter at MBB. And, also remember, that most people ... (read entire answer)
7
Answers
600
Views
48
Total Upvotes
on Nov 25, 2022 on Nov 25, 2022
Last Activity

Coaching for math

mental math
Most recent answer on Jun 27, 2022
The best answer (on Jun 26, 2022) is from:
Kurt
Expert
Conducted over 100 interviews for grads, interns & experienced hires
Kurt
Expert
 gave the best answer on Jun 26, 2022
Conducted over 100 interviews for grads, interns & experienced hires
Hi - great question.Aside from practice, the best approach would be for a coach to give you cases specifically designed to test quant skills, observe where your weak points are and what is driving them and develop a pla ... (read entire answer)
4
Answers
776
Views
27
Total Upvotes
on Jun 27, 2022 on Jun 27, 2022
Last Activity

Mental Math Coaching

mental math
Most recent answer on Apr 30, 2022
The best answer (on Apr 29, 2022) is from:
Francesco
Expert
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Francesco
Expert
 gave the best answer on Apr 29, 2022
#1 Coach for Sessions (4.500+) | 1.500+ 5-Star Reviews | Proven Success (➡ interviewoffers.com) | Ex BCG | 10Y+ Coaching
Hi there, You can always write down the math, unless the interviewer explicitly asks to do the math in your head, which is quite rare. For this reason, I would recommend to prioritize how to approach math and avoid mist ... (read entire answer)
7
Answers
713
Views
29
Total Upvotes
on Apr 30, 2022 on Apr 30, 2022
Last Activity

Math errors!!

Case Maths mental math
Recent activity on Mar 30, 2022
The best answer (on Mar 30, 2022) is from:
Ian
Expert
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Ian
Expert
 gave the best answer on Mar 30, 2022
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Hi there, This isn't trivial at all - don't worry, you're not alone and it's a common problem! Rote Math Practice Rocketblocks and Math-Drills have great math practice drills Organization Have a seperate "math" scrap sh ... (read entire answer)
6
Answers
907
Views
58
Total Upvotes
on Mar 30, 2022 on Mar 30, 2022
Last Activity

How to calculate a market sizing case instinctively and quickly?

Calculation tips Case Calculations Market sizing mental math
Most recent answer on Dec 31, 2021
The best answer (on Dec 31, 2021) is from:
Ian
Expert
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Ian
Expert
 gave the best answer on Dec 31, 2021
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Hi there, Providing some market sizing thinking for anyone revisiting this Q&A: Remember that there's rarely a "best" answer with market sizing. What's important is that you break down the problem the way it makes s ... (read entire answer)
2
Answers
3.1 k
Views
2
Total Upvotes
on Dec 31, 2021 on Dec 31, 2021
Last Activity

Improve my math

mental math
Recent activity on Oct 31, 2021
The best answer (on Oct 29, 2021) is from:
Ian
Expert
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Ian
Expert
 gave the best answer on Oct 29, 2021
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
100% Recommend Rocket Blocks. It's exactly what you're looking for Online "Drills": https://www.preplounge.com/en/mental-math Math sheets (print these and do them on paper): Google Math Drills sheets In addition to that ... (read entire answer)
2
Answers
770
Views
17
Total Upvotes
on Oct 31, 2021 on Oct 31, 2021
Last Activity

Math

mental math
Most recent answer on Oct 28, 2021
The best answer (on Oct 25, 2021) is from:
Ian
Expert
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Ian
Expert
 gave the best answer on Oct 25, 2021
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate
Hi there, It's really hard to provide you a set rule here as it truly is contextual. The general rule is that math should be reasonably fast and accurate. If the math is simple, it should take 10-20 seconds. If the math ... (read entire answer)
5
Answers
1.0 k
Views
36
Total Upvotes
on Oct 28, 2021 on Oct 28, 2021
Last Activity

Math: word problems exercises

Case Interview case interview preparation case math fast math math Math problem mental math Word problems
Question edited on Sep 05, 2021
The best answer (on Aug 08, 2018) is from:
Vlad
Expert
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Vlad
Expert
 gave the best answer on Aug 08, 2018
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Hi, Something that helped my candidates - download ALL casebooks available online and go through the math problems in the cases. They will give a good sense of required business terminology. Then you can google what y ... (read entire answer)
4
Answers
9.2 k
Views
5
Total Upvotes
on Sep 05, 2021 on Sep 05, 2021
Last Activity

Best resources for math improvement? (for a complete number novice!)

fast math math mental math Quantitative skills
Recent activity on Sep 05, 2021
The best answer (on Aug 22, 2019) is from:
Vlad
Expert
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Vlad
Expert
 gave the best answer on Aug 22, 2019
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Hi, Basically, you need to develop 3 calculation skills: 1) Learn how to multiply double-digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJHo). 2) Learn how to work with zeros. Best way - always use 10^power ... (read entire answer)
5
Answers
3.3 k
Views
9
Total Upvotes
on Sep 05, 2021 on Sep 05, 2021
Last Activity
1 - 20 of 43 results
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