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April 16, 2015

#CherylsBirthday: The Indonesian Grade-School Math Problem That Went Viral

No doubt, this is a tough question.


Pardon the bad English (it's Singapore). Let this blow your mind: this math question is intended for Singaporean fifth graders. (However, it's caused a controversy for being too tough for fifth graders.

That Atlantic link above contains a hint for getting started (in very early days of the logic, so it's not a major spoiler), if you want to try to figure it out yourself.

This BBC link has an explanation of the solution.

(Personally, I got through the early deductions, and was on the right track on the last couple of them, but then veered off and crashed into the bushes.)

And if you like that, or didn't like that but want a shot at another puzzle to prove You're Still a Man, you can try this other one from the BBC.


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posted by Ace at 02:01 PM

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