Case Math Trainer

No calculator. A clock running. An interviewer listening. Numbers in the millions where one dropped zero ends the discussion. The arithmetic was never the hard part, but the conditions are, and it's tough to practice them.

Case Math Trainer drills the problem solving conditions, not just the math.

DAILY ADAPTIVE TRAINING
• Timed arithmetic sprints at business magnitudes — 748M ÷ 11, not 12 ÷ 4
• Dedicated zeros-management drills for the #1 careless-error class
• Word problems where picking the right formula is scored separately from computing it — because most "math" misses are setup misses
• Exhibit reading: pull numbers off bar, line, waterfall, and table charts under time pressure, and answer in real units
• Benchmark decks on spaced repetition: 1/7 ≈ 14.3%, rule of 72, the shortcuts that free your working memory

ANSWER OUT LOUD
One block per session is spoken, not typed. On-device speech recognition checks your answer and times how long you hesitated before speaking — the composure metric interviews actually score.

ASSESSMENT PREP
• Trap sprints: percentage points vs. percent, weighted averages, denominator switches — every wrong option is a real classic error
• Rapid-averaging speed drills
• A mini-simulation that makes you collect data into a research journal from exhibits, then compute through chained questions where your own errors cascade

IT ADAPTS TO YOU
Every skill has its own difficulty staircase. Sessions are composed from your weaknesses — miss zeros this week, and next week's sessions know. Smart-rounding walkthroughs after every problem show the path a strong candidate takes.

PRIVATE BY DESIGN
No account. No tracking. Nothing leaves your phone — speech is processed on-device and never stored. Your data is yours, exportable anytime.

Built for anyone preparing for consulting-style case interviews or quantitative assessment games.