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Adjacent Roles
Consulting & Strategy

Case Math & Mental Arithmetic Drill

TechnicalEasy~30 minDesigned by experts

About this interview

A technical interview on Adjacent Roles, pitched at the easy level. A voice AI interviewer leads the conversation, adapts its questions to your answers, keeps you on topic, and afterward gives you honest, specific feedback on where you were strong and where to improve. Expect roughly 30 minutes.

What you'll be assessed on

Perform percentage, margin, and markup calculations quickly and narrate them in short spoken checkpoints
Compute break-even volume and weighted-average blends from raw inputs without a calculator
Apply compound growth and the Rule of 72 to estimate multi-year outcomes with sensible rounding
Distinguish additive approximations from true compounding, and know when each is good enough for a live case
Sanity-check a computed result against intuition before presenting it as final

Topics covered

PercentagesMarkupMarginPercentage ChangeGrowth RateDiscountingContribution MarginBreak-EvenChurn/RetentionWeighted AverageMarkup PricingProfit CalculationSequential Percentage ChangeMargin/COGS

A few sample questions

Just examples to set expectations - the real interview has many more and adapts to your responses.

What is 15% of 240?
Product A is 60% of sales at a 20% margin. Product B is 40% of sales at a 50% margin. What is the blended margin across both products?
A $500 million market grows at 8% a year. Approximately how big is the market after 3 years?

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