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How Many Students Got an A?

Math brain teasers require computations to solve.

 

Puzzle ID:#331
Fun:*** (2.57)
Difficulty:** (1.63)
Category:Math
Submitted By:Phyllis*****!
Corrected By:Atropus

 

 

 



The teacher has finished grading the math papers at West High School. The class size is under 30. One third of the class got a `B`, one fourth got a `B-` and one sixth got a `C`. One eighth of the class flunked and the remainder of the class received an `A`.

How many students in the class received an `A`?

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Answer

Find a common denominator for 3, 4, 6 and 8. The only common denominator smaller than 30 is 24. Therefore, the class size was 24 and the grades were:
B: 8
B-: 6
C: 4
D/F: 3
The number of students who received A`s was 3 (24 - 21)

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