A class has 30 students. 18 of them study Spanish, 15 study French, and 6 study neither language. How many students in the class study both Spanish and French?
9 students
If 6 students study neither, then 30 - 6 = 24 students study at least one language. Adding Spanish and French enrollments yields 18 + 15 = 33. The overlap (those studying both) is 33 - 24 = 9 students.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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