In a office of multi-lingual employees, 15 people speak English, 12 speak Spanish, and 5 speak both English and Spanish. Everyone in the office speaks at least one of these two languages. How many total people work in the office?
22 people
Using the inclusion-exclusion principle: Total = (English speakers) + (Spanish speakers) - (Both) = 15 + 12 - 5 = 22 people.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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