Logic Puzzles

Classic logic puzzles in which you infer or deduce actions and outcomes based on information provided

Boxes of Apples and Oranges

There are three identical boxes of apples and oranges, except one contains all apples, one contains all oranges, and one contains a mix.

The boxes are labeled “apples”, “oranges”, and “apples and oranges” but all 3 boxes were labeled incorrectly!

You have the opportunity to inspect fruit from the boxes one at a time, without looking inside the box. What is the fewest number of fruit you need to inspect to correctly label the contents of the identical boxes?

This was a popular brainteaser in some engineering interviews a while back, including a software quality assurance engineer interview at Apple.

Preparing for a brain teaser interview? Check out our ultimate guide to brain teaser interviews.

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