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# Where to find case frameworks?

BCG McKinsey
New answer on Jul 16, 2020
1.9 k Views

where can i find case techniques like rule 72 for compound, etc? Is there any list of such things for case interview?

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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, Perperuity
• CAGR using the Rule of 72
• Currencies exchange calculations
• Speed, time, distance calculations
• Equations, systems of equations
• Ratio & Proportions
• Solving the problems by calculating the area of the triangle
• Profit / breakeven formula
• Correlations, outliers (being able to spot on the graphs, tables)

2) Fast math skills

• Rounding up and down
• Learn how to multiply double digit numbers (google fast math tips)
• 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) Working with tables and graphs and deriving conclusions

• Study "Say it with Charts" book
• Check all available MBB presentations and publications. Practice to derive conclusions and check yourself with the actual ones from the article / presentation
• GMAT IR part (Official guide and Manhattan prep)
• Learn basic statistics (Any GMAT or MBA prep guides)

Good luck!

Hello!

I wuold suggest you to practice with GMAT.

GMAT unfortunately only gets better with practicing. Good news is that there are many ways of doing so!

There are free exams in the internet that you can use for practice (the one of LBS MBA page, Verits prep, as well as some free trials for courses such as the one of The Economist (https://gmat.economist.com/)

Hope it helps!

Cheers,

Clara

Hi Alex,

the most common formulas you need to know in a consulting interview are:

• Breakeven point
• Rule of 72
• Perpetuity formula and general NPV formula

Besides that, you should be familiar with simple and compound interests.

Finally, you may want to review the formulas for volume/surface of the main solid figures (pyramid, cone, cylinder, sphere), which could be useful in market sizing cases.

Best,

Francesco

(edited)

Hi Alex,

I see two aspects to your question:

1. Case interview math: Just google this term "case interview math" and you will get more than enough resources
2. More general case interview frameworks and business concepts: I wrote a book very specifically for this topic giving a) an overview of relevant business concepts and frameworks and b) how to specifically use this concepts and frameworks in a real-life approach: http://cif.consulting-case-interviews.com/

Hope that helps!

Robert