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Wednesday, May 16, 2012

Challenging Math Problem (PSLE) with solution



•88 children took part in a swimming competition.
•1/3 of the boys and 3/7 of the girls wore swimming goggles.
•Altogether 34 children wore swimming goggles.
•How many girls wore swimming goggles on that day?


Solution below:



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3 comments:

  1. Ban HengMay 27, 2012 at 11:38 PM

    While I could see that you tried to differentiate between the units representing the boys and girls with different colours, the size of the units seems to indicate that they are the same. A more accurate depiction would be to use units of different length to represent the boys and the girls. Just a minor point for your consideration.

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    Replies
    1. Chris SiewMay 28, 2012 at 7:05 AM

      Thanks for the feedback. Nice to hear from you again. How's things in NZ?

      Delete
  2. UnknownDecember 26, 2017 at 5:37 PM

    Great problem. Can you tell me its origin? Thanks

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