Revenue by region, $ millions:
| Region | Last year | This year |
|---|---|---|
| West | 6.2 | 8.1 |
| Central | 8.1 | 10.3 |
| Coastal | 3.5 | 4.1 |
| North | 3.8 | 4.9 |
Which region's revenue grew fastest?
Answer: D: West
Why: "Grew fastest" means percentage growth. West: 1.9 on 6.2 = 30.6%; Central: 2.2 on 8.1 = 27.2%; Coastal: 0.6 on 3.5 = 17.1%; North: 1.1 on 3.8 = 28.9%. West is highest. Central added the most dollars, which is the trap.
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This is one of the free numerical questions from our Bain question bank. It practises the most common numerical trap in business data questions: confusing the biggest increase in money with the fastest growth in percentage terms.
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