# Can you solve it? This school maths question has left the world stumped

15 April 2015

The internet loves freaking out about things. Whether it is if a dress is white and gold or blue and black, we all love a good conundrum.

The latest is one of logic -- or our apparent lack thereof.

Kenneth Kong, a television host in Singapore, posted the maths problem on his Facebook, and it's sent the net into a frenzy. According to reports the problem was part of a maths test for high school children at an elite Singaporean school. Students there seemingly had no problem in solving it. Can you say the same and figure out when Cheryl’s birthday is? Since the wording of the original problem is quite confusing to say the least, The New York Times simplified the language a bit.

Albert and Bernard just met Cheryl. “When’s your birthday?” Albert asked Cheryl.

Cheryl thought a second and said, “I’m not going to tell you, but I’ll give you some clues.” She wrote down a list of 10 dates:

May 15 — May 16 — May 19

June 17 — June 18

July 14 — July 16

August 14 — August 15 — August 17

“My birthday is one of these,” she said.

Then Cheryl whispered in Albert’s ear the month — and only the month — of her birthday. To Bernard, she whispered the day, and only the day.

“Can you figure it out now?” she asked Albert.

Albert: I don’t know when your birthday is, but I know Bernard doesn’t know, either.

Bernard: I didn’t know originally, but now I do. Albert: Well, now I know, too! When is Cheryl’s birthday? Can you figure it out? If you think you’ve got the answer, you can find it here, with an explanation.

Sources: The New York Times; The Telegraph

-- Petrus Malherbe

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