Free sample from the Deskcraft question bank
Built from conversations with hundreds of investment bankers about what they ask in interviews. Our sources
Trading, quant and some banking interviews throw brain teasers to test composure and quick reasoning. These are real ones from the Deskcraft bank — mental math, probability, market sizing and estimation — with the method worked out, not just the answer.
Model answer
Use the rule of 72: seventy-two divided by fifteen is about 4.8, so just under five years. The rule of 72 approximates doubling time for a compound growth rate.
Model answer
Around 300 to 400. Estimate roughly 30 to 35 lines a page and about 10 to 12 words a line, then multiply. Showing the line-by-line reasoning is the point.
Model answer
Around 20 tonnes. A 737 holds roughly 26,000 liters of jet fuel at about 0.8 kilograms per liter, which is about 20,000 kilograms. It is volume times density.
Model answer
3 in 8. There are three ways to place two heads among three flips, and each specific sequence has probability one-eighth, so three-eighths.
The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →The model answer for this question is inside Deskcraft — along with 5,000+ more, graded practice and voice mocks.
Unlock the full bank →5,000+ questions with model answers, adaptive drills, AI voice mocks, a model auto-grader and deal simulations — with a readiness score across every dimension a real process judges.
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