Hi there,

Best way to practice math part of cases is doing actual cases. Look for online casebooks from business schools and consider getting a coach to learn the basics.

If you want to specifically improve the mental and fast math part, here you have some ideas:

• Practice on Rocket Blocks
• Do online drills on PrepLounge: https://www.preplounge.com/en/mental-math
• Google “math drill sheets” and print them to do it on paper

Don't forget to also practice under time pressure.

Happy to keep talking about this in private, just send me a message.

Best,

Alberto

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Check out my latest case based on a real MBB interview: Sierra Springs