Estimation question

How many iPads are sold in the USA every year?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Whether the candidate can build a market sizing estimate using population, adoption rate, and replacement cycle assumptions.

State scope: assume US iPad sales specifically, not all tablets, and confirm this with the interviewer.
Estimate the US population, roughly 335 million, and assume roughly 45 percent own a tablet, giving roughly 150 million tablet owners.
Assume iPad holds roughly 30 percent share of the US tablet market, giving roughly 45 million iPad owners.
Assume an average replacement cycle of 4 to 5 years, meaning roughly 20 to 25 percent of owners replace their device annually.
Multiply: 45 million times 22 percent gives roughly 10 million iPads sold per year, plus new first-time buyers, landing in an 8 to 12 million range.

Separates the installed base calculation from the annual replacement rate, avoiding the common error of estimating total ownership instead of annual sales.
States iPad's specific market share within tablets rather than treating all tablet owners as iPad owners.
Accounts for first-time buyers in addition to replacements, giving a more complete annual sales estimate.

Chapters of the AI PM course that teach what this question tests.