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Posted by on Wednesday, July 15, 2009 at 12:48am.

Linda got a math test handed back to her and got a 96% on it. However she lost the test, not knowing what she got. If she knows that she scored a 43 on the test then how many 1- mark questions are there on the test?

  • Math - , Wednesday, July 15, 2009 at 8:07am

    Let N be the number of 1 mark questions.
    43/N = 96/100
    N = 100*43/96 = 44.79
    Since N has to be an integer, so we need to round 44.79 to the nearest integer. In addition, as a check, divide 43 by N to make sure we get back 96%.

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