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... (more)

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

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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... (more)

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... (more)

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... (more)

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/... (more)

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... (more)

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... (more)

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... (more)

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... (more)

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?... (more)

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... (more)

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... (more)

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... (more)

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, Perperuity CAGR using the Rule of 72 Curre... (more)

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... (more)

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... (more)

Hi Anonymous, the problem you mentioned is very common. The majority of the people are actually ok with the math in a case in normal conditions. However they “suddenly” make a lot of mistakes once... (more)