Recently, the Atlantic reported on The Math Question That Went Viral.  The question was given in a Singapore and Asian Schools Math Olympiad for Secondary 3 students (the equivalent of 9th grade in US).  Here is the question in full:
 
Solution and full explanation provided here:  “P5″ logic question is actually a Math Olympiad question for Sec 3 and 4 students.  I got close but didn't solved the whole thing.  My error was that I didn't read the problem closely enough.

 
1 comment:
If it made it to In Progress, it must be viral. I love these kinds of problems, because what you don't know is as important as what you do. A life long lesson. This is a good one, but I have learned to read carefully.
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