Mental Math Interview Trainer

Train your brain like top candidates at McKinsey, BCG, or Bain. Mental Math is your fast-track to mastering the quantitative skills in high-stakes interviews.

Mental Math helps you build fast, reliable mental calculation skills through short, focused practice sessions.

Whether you are preparing for consulting interviews (McKinsey, BCG, Bain), finance or tech case interviews, or any role that tests quantitative reasoning, this app gives you a simple way to drill the exact skills you need: quick multiplication, percentages, division, and growth calculations.

Practice in three modes: • Speed: solve as many problems as you can before the clock runs out • Accuracy: answer a fixed set of questions and aim for precision • Custom: pick specific categories and set your own time limit

Adjust difficulty from Easy to Hard and fine-tune the tolerance margin so drills match your current level. Your results are saved locally on your device so you can track progress across sessions and spot improvement over time.

Features: • Short daily mental math drills designed for interview prep • Speed, Accuracy, and Custom practice modes • Multiplication, percentage, division, and growth exercises • Adjustable difficulty and tolerance controls • Session summaries and long-term performance stats • Lightweight, distraction-free design • Available in English, French, and Spanish

Perfect for consulting interview prep, case interview math, finance interviews, product management interviews, or anyone looking to sharpen their everyday arithmetic.