Is there a list I can find somewhere for all the math formulae you need to know for cases? I see some variations in ROI formulae (some use Annual profit/Investment cost and others (Annual Profit - Investment cost)/Investment cost). What's the right formula? If there are some resources that can help with that'd be great.
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Hi there,
Some key formulas/concepts:
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Some great answers from a variety of angles have already been asked. Check these out!
Mental Math
https://www.preplounge.com/en/consulting-forum/mental-math-help-7962
https://www.preplounge.com/en/consulting-forum/is-quick-mental-math-a-skill-that-can-be-learned-5210
Conceptual/Contextual Math
https://www.preplounge.com/en/consulting-forum/materials-for-practicing-conceptual-case-math-8016
https://www.preplounge.com/en/consulting-forum/math-concepts-6951
Key Math Equations
https://www.preplounge.com/en/consulting-forum/math-equations-their-use-7934
Math Practice
https://www.preplounge.com/en/consulting-forum/case-math-practice-6877
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Hi, I recommend look at the Bootcamp here in the platform, very insightful both for practicing and testing
Best,
Antonello
Hello!
Being 80-20, the ones you need are break even and NPV -both the normal one and in perpetuity-
Hope it helps!
Cheers,
Clara
Hi there,
The formula for ROI is Net income from investment / Investment cost (equivalent to the first you mentioned). So if you buy something for 5 and resel it for 10, your ROI is:
(10-5)/5 = 100%
The most common formulas you need to know in a consulting interview are:
Besides that, you should be familiar with simple and compound interests.
Best,
Francesco
