Hello! For what I have seen with my coachees, people struggle the most when calculations are "long" (i.e., many chained calculations in which the end you loose magnitude of numbers). This could be... (read entire answer)

# All questions tagged math - Consulting Q&A - PrepLounge.com

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Hi, I recommend downloading all casebooks available online and check the math problems. You'll have a good list. Here are some of them to keep in mind: Interest rates calculations Compound... (read entire answer)

Hello! Bear in mind that approximations are not only "accepted", but also a good sign (e.g., I prefer a candidate who gives me the "good big numbers" in a very agile way that one that takes long to... (read entire answer)

Hello! The best is to practice, practice, practice! I could recommend you to start with: 1. GMAT exams: that can be found for free in the internet (GMAT prep with The Economist, London Business... (read entire answer)

Hi Anonymous, as general practice for the PST, I would recommend the following approach: Try to find at least 5-6 practice cases online. There are several available for free, if needed you ca... (read entire answer)

Hi, Here is a set of things you need to know: 1) Math and formulas: Interest rates calculations Compound margin NPV using the Rule of 72, Perpetuity CAGR using the Rule of 72 Curre... (read entire answer)

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 y... (read entire answer)

Hi, Any of these tools are good: Preplounge Mental Math, V. Cheng, Mimir Math. It's more about the skills. I recommend to concentrate on the following: 1) Learn how to multiply double digit numbers... (read entire answer)

Hi, Simply learn the division table up to 1/11 (i.e. 5/6 = 83.3%). It will help you calculate any percentage problems. For example, if your market is $620M and your revenues are $51M you can use 5/... (read entire answer)

First off, huge congratulations on your upcoming interview! To answer your question direct: accuracy trumps speed: I've never said no to a candidate who ticked off all other boxes, but was slow wi... (read entire answer)

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... (read entire answer)

Hi! Here are my 5 tips: 1) Practice mental calculation daily (percentages, decimal places, large numbers, arithmetic) – even though it's not the most important part of the interview and it's all... (read entire answer)

Hello Sabrina, I would recommend you three things: 1. Write all standard formulas together (break-even, NPV, etc) and memorize them. With that a large part is already won! 2. For developing unk... (read entire answer)

Hi Anonym A, for many who have difficulty with mental arithmetic, it's just the stressful interview situation. What about you? How good are you at mental arithmetic if you practice alone at home?... (read entire answer)

Hi, I'm afraid the best and the only way is to download all casebooks available online and go through the math problems in the cases. Several formulas and tools can be useful: Interest rates... (read entire answer)

Hi Anonymous, the market, the company, the customer preferences etc. all play into the financials. The financials are DRIVEN by these factors! So you need to outline the numerical driver tree, and... (read entire answer)

Hi, When performing a calculation, I recommand : Split the discussion in two : start with the structure of the calculation, and once it's validated draw hypothesis and perform the calculation whe... (read entire answer)

You're correct in stating that the assumption of "court use = 1 hour per member per week" means that each member can only use the court for one hour per week. This prevents double counting as each mem... (read entire answer)

Hi, Pls find below my list 1) Case math Practice common market sizing topics (Airport passenger flow, real estate volumes, subway passenger flows, car usage, etc.). You should become comforta... (read entire answer)

Whatever works best for you - your notes are non-evaluative (except in the context of communicating your structure) and will be thrown away after your interview. Therefore the only consideration is wh... (read entire answer)