iPhone X-Change: L.E.K.-Style Growth Case Interview
iPhone X-Change is an easy-difficulty L.E.K.-style growth case interview with 6 interviewer questions and 1 exhibit; candidates finish it in a median 16 minutes. Your first full case is free with an account: run it out loud with an AI interviewer or step by step.
| Case type | Growth |
|---|---|
| Industry | Consumer Goods |
| Firm style | L.E.K. |
| Difficulty | Easy |
| Interviewer questions | 6: context, clarifying, structure, math, analysis, synthesis |
| Math questions | 1 |
| Exhibits | 1 |
| Modes | Voice and guided |
| Completed runs | 30 |
| Median time | 16 minutes |
| Source | Adapted from the Duke Fuqua consulting club casebook |
Runs, times and ratings are from Road to Offer practice data as of 6 November 2026.
The case
Electronics Co is a US distributor that buys used phones, tablets, laptops, and other consumer electronics from consumers and resells them online. The client wants to size the total US market opportunity across used-device verticals.
The analysis focuses on the U.S. secondhand consumer-electronics opportunity. The case supplies category volumes, used shares, U.S. shares, and used-device prices, but does not label the volume row's timeframe or starting geography.
The interviewer's first question
Summarize Electronics Co.'s business, objective, and the analysis required.
Exhibits you will read
- Exhibit 1: Used-Device Market Inputs
What this case tests
One math step, one exhibit and one analysis question: this case balances calculation with reading the data.