Best ressource to practise case style math?

Hey! 

I often just do math coaching with my mentees with selected case math examples I have. 

Let me know if you are interested. 

BR; A

Hey there,

For mental math fundamentals, these are solid and widely used:

• PrepLounge mental math drills
• Magoosh mental math flashcards 

For case-style math specifically:

• Practicing full cases with exhibits and redoing the math sections on your own is still one of the most effective approaches
• I'm using dedicated case-math workbooks that focus specifically on exhibit interpretation, setting up calculations, and simplifying numbers without running full cases

If helpful, I’m happy to walk you through a few of these exercises or share how to practice this efficiently

I see you've already been pointed to some resources. 

Adding here a collection of the typical formulas and terms you need for interviews:

• • Cheatsheet: The Must-Know Consulting Terms for Interviews

Best,
Cristian

That is a fantastic question. You’ve hit on the subtle difference between 'being good at math' and 'being good at case math,' which is fundamentally about data literacy and interpretation. The issue in the interview is rarely the calculation itself, but managing ambiguous inputs and exhibits under pressure.

You are right to look beyond general casebooks, as those often provide clean, pre-packaged numbers. What you really need to practice is translating a dense, sometimes poorly formatted exhibit—which mimics messy client data—into the single required input for your next calculation step.

Here are the high-leverage resources I’ve seen successful candidates use for this specific skill:

1. RocketBlocks: They have excellent structured drills specifically focused on the four major quant areas (Market Sizing, Profitability, Break-Evens, etc.). It forces the necessary speed and structured thinking required to avoid getting paralyzed by complexity.

2. GMAT Data Sufficiency (DS) Practice: This is a surprisingly useful proxy for exhibit work. While it’s test prep, the logic behind DS questions trains you to isolate exactly what information you need and discard the rest. In a case, 80% of the numbers on a provided exhibit are irrelevant distractions; DS drills sharpen your ability to find the necessary 20%.

3. Focus on Estimation: Before you ever calculate, spend a few seconds setting up your expected range. If you multiply 45,000 by 12% and get 54,000, you know you’ve misplaced a decimal. This sanity-check skill—knowing the rough answer before you calculate the precise one—is what interviewers look for.

Hope it helps! Getting comfortable with data ambiguity is key.