questions / estimation
estimation questions
01 How many e-scooter rides happen in San Francisco in a month?A complete worked estimation answer for the SF e-scooter rides PM interview question, with real SFMTA data, dual approach, and sanity check. standard → 02 Estimate the size of the US electric vehicle market.A worked bottom-up estimation for PM interviews, with 2025-2026 data anchors, three valid approaches, and the policy shock most candidates miss. standard → 03 Estimate the number of gas stations in the United States.A worked PM estimation answer with two independent approaches, a sensitivity driver step, and the 2026 EV follow-up. Structure beats arithmetic. warmup → 04 How many queries does Google handle per second?A worked bottom-up estimation of Google QPS for PM interviews, including scope clarification, user segmentation, and the 2026 AI Overview cost layer. standard → 05 How many iPads are sold in the US per year?A dual-method estimation walkthrough for PM interviews. Bottom-up household model plus a top-down Apple revenue cross-check, with the business insight layer. standard → 06 How would you estimate the size of the US pet food market?A worked bottom-up estimation of the US pet food market with real anchor numbers, a sanity check, and the PM "so what" that separates a hire from a pass. standard → 07 How many messages does Slack send per day?A step-by-step estimation for PM interviews. Segment DAU by user type, layer in bot traffic, and sanity-check against the 1.5B anchor. standard → 08 How many piano tuners are there in New York City?Worked Fermi estimation for PM interviews. Full decomposition, institutional segment, sanity check, and what the interviewer actually scores. warmup → 09 How many restaurants are in Mumbai?A worked estimation for the PM interview question on Mumbai restaurants, covering organised vs. unorganised sectors, cloud kitchens, and the 2026 product angle. standard → 10 How would you estimate the annual revenue of a single Times Square billboard?A step-by-step estimation framework for Times Square billboard revenue, with real CPM, rotation, and occupancy numbers you can defend out loud. standard → 11 How many Uber rides happen in New York City per day?A worked PM estimation with demand-side and supply-side methods, real TLC anchor data, and NYC-specific constraints. Builds to ~550K with a range of 500-600K. standard → 12 How would you estimate the size of the US toilet paper market?A worked bottom-up estimation of the US toilet paper market with consumer vs. institutional split, real anchor numbers, and the PM so-what. standard → 13 How many windows are in New York City?A PM estimation with borough-by-borough building-type segmentation, real NYC housing data, the curtain-wall architectural nuance, and the 2026 interviewer expectations. standard →