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Thread: When is Cheryl's birthday ??

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  1. #1
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    When is Cheryl's birthday ??

    It was meant to be a question to test teenagers at an elite high school in Singapore.

    Albert and Bernard just become friends with Cheryl, and they want to know when her birthday is.

    Cheryl gives them a list of 10 possible dates:

    May 15/16/19

    June 17/18

    July 14/16

    August 14/15/17

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

    Here are the hints ;

    - Albert: I don't know when Cheryl's birthday is, but I know that Bernard doesn't 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 ?


    It took me one freaking afternoon to get the answer !!!

    Try not to find the answers from Internet....
    Chinese tea is good, lager beer is better, 香檳 is the best..

  2. #2
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    Nice puzzle.
    The first 2 hints are actually important to solving it.
    I think I solved it (did not Google for the answer) but will not post - give others a chance to work it out

  3. #3
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    Who is Cheryl??

  4. #4
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    Quote Originally Posted by cskok8 View Post
    Who is Cheryl??
    I think she is her mother's daughter..
    Chinese tea is good, lager beer is better, 香檳 is the best..

  5. #5
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    Quote Originally Posted by kwchang View Post
    Nice puzzle.
    The first 2 hints are actually important to solving it...
    Half of the 1st hint is actually redundant.

    The 2nd and 3rd hint help to eliminate the unknowns and irrelevant possibilities.
    Chinese tea is good, lager beer is better, 香檳 is the best..

  6. #6
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    that 3 timing bitch! She told me, I am the only one!
    in luv with bikes...in lust with AphroditeS AWAS! Suspek is an Avid procurer to myths, lies, legends, folklores, i-ching, rumors, misinformation, cakap-ayam, spɹoʍ uʍop ǝpısdn puɐ˙˙DLL .
    p/s Take all the above with a XL salted duck egg, wash down with 2fingers of sodium hypochoride, and suck on to a pebble size tmn negara Rock salt

  7. #7
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    Quote Originally Posted by opulant View Post
    Half of the 1st hint is actually redundant.

    The 2nd and 3rd hint help to eliminate the unknowns and irrelevant possibilities.
    If you see my explanation, you will see that the 1st and 2nd hint is very necessary

  8. #8
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    I think this question was originally a Primary 6 exam question. It went viral because of a DJ posted it in his Facebook. There was a lot of discussion in the social media should this kind of question for primary school kids even the adults are finding it difficult to answer. Though it means to filter the top 40% students (I can’t remember was it top 20 or 40 percentile).

    PSLE (or Primary School Leaving Examination) is set by our local institution unlike Singapore GCE O & A level which are set by Cambridge. The pressure on the kids are mounting to the extend that some parents are taking leaves during PSLE examination period. Even the newspaper or radio are talking about it when come to the PSLE examination period.

    Personally, I think our local examiners are overdoing it which make the kids “mathphobia”
    有才而性缓定属大才,有智而气和斯为大智.

  9. #9
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    My kid showed me this question which was given by his replacement math teacher when the math teacher was on medical leave. I guess the teacher picked this question from the Internet..

    It's shocking to know this is a question for PSLE. It took me more than 1 hour to find the answer and this is done without the time pressure in exam... !!
    Chinese tea is good, lager beer is better, 香檳 is the best..

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