Can You Solve the Singapore High School Math Problem That Is Stumping the Internet?

It's testing season throughout much of America as students sit through countless hours of controversial exams over the next few weeks. But if you thought Common Core math was mind-numbing, wait until you see what students in Singapore are facing. A math problem found on a test for 14-year-olds in the Singapore and Asian Schools Math Olympiad last week is not only stumping students there, it's stumping the entire Internet.

The question was shared by Kenneth Kong — a television host in Singapore — on his Facebook page. It reads:

Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates: May 15, May 16, May 19, June 17, June 18, July 14, July 16, August 14, August 15, August 17.

Cheryl then tells Albert and Bernard separately the month and the day of her birthday, respectively.

Albert: I don't know when Cheryl's birthday is, but I know that Bernard does not know too.

Bernard: At first I don't know when Cheryl's birthday is, but I know now.

Albert: Then I also know when Cheryl's birthday is.

So when is Cheryl's birthday?

Now the Internet community, and math-proficient high school students throughout Singapore, want to know when Cheryl's birthday is. But the organizers of the test are none too happy. Students are not allowed to take phones into their exams, so the test creators are miffed that one of their questions leaked. The exam, which is given in 15 countries, hasn't been administered in Cambodia yet, so they plan to replace the leaked question with a new one.

But back to the question that's on everyone's mind . . . what is the answer to the problem? Read on for the spoiler.

The Answer: July 16
Facebook | Singapore and Asian School Math Olympiads

The Answer: July 16

According to the Singapore and Asian School Math Olympiads, the group that wrote the test, the answer is July 16. If their explanation of the answer is still confusing, check out Business Insider's step-by-step explanation.

All we know is that we won't be telling Cheryl any secrets anytime soon!