10-Minute Mental Math Interview Routine
A repeatable 10-minute plan to improve interview math speed and accuracy without burnout.
Open guide →Interview Prep
Mental Math Interview Practice Hub
Quick answer: build interview math skill with short, repeated timed drills and operation-specific practice. This hub gives you structured guides for percentages, estimation, market sizing, unit economics, and speed benchmarks.
Start Here (10-Minute Plan)
- Warm up for 2 minutes with easy mixed arithmetic.
- Run one focused drill (percentages, multiplication, or division) for 6 minutes.
- Finish with a 2-minute timed benchmark and log score + accuracy.
Core Interview Math Guides
How to Do Percentages Fast in Interviews
Shortcut methods to calculate percentages quickly in consulting and finance interview cases.
Open guide →Market Sizing Math: Fast Back-of-the-Envelope Calculations
A practical framework for sizing markets quickly with assumptions interviewers can follow.
Open guide →Guesstimate Framework for Case Interviews
Use this framework to move from vague prompts to clear, defendable estimates under pressure.
Open guide →Business Word Problems: Fast Translation to Math
Turn interview word problems into simple equations quickly and accurately.
Open guide →Mental Math Speed Test for Interview Readiness
A practical benchmark method to measure if your interview math is fast enough.
Open guide →Division and Averages for Interviews
Methods for quicker division and average calculations in case interviews.
Open guide →Growth Rates and CAGR Mental Math
Fast methods to estimate growth rates and CAGR during finance and consulting interviews.
Open guide →Quick Multiplication Patterns for Interviews
Pattern-based multiplication shortcuts for faster arithmetic in interview settings.
Open guide →Rounding and Estimation Under Interview Pressure
Make faster, cleaner interview calculations using deliberate rounding and correction.
Open guide →Unit Economics Math for Product and Growth Interviews
Mental math patterns for CAC, payback, margin, and LTV-style interview questions.
Open guide →Brain-Friendly Drill Plan to Avoid Burnout
A sustainable practice plan for interview math that improves consistency without overtraining.
Open guide →FAQ
How quickly can I improve interview mental math?
Most people see measurable speed and accuracy gains in 2-4 weeks with consistent daily timed practice.
Which interview math topics should I start with?
Start with percentages, multiplication patterns, division/averages, and rounding-based estimation.
Should I prioritize speed or accuracy first?
Keep accuracy above 90% while pushing speed gradually. Accuracy collapse is a sign to reduce pace briefly.