Find theTotal Number of Children in The Class?

The number of boys in a class is three times the number of girls. Which one of the follow numbers cannot represent the total number of children in the class?

  1. 48
  2. 44
  3. 42
  4. 40
Anurag Mishra Professor Asked on 12th October 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3) 42

    Explanation:-
    Let the number of children be X
    The number of boys in a class is three times the number of girls.
    Then, the number of girls = X
    Therefore, the number of boys = 3 X

    So, the total number of children = X + 3 X
    = 4 X

    Then, the number of children must be  divisible by 4.
    Here, only 48, 44 and 40 are the divisible by 4 and 42 is not divisible by 4.
    Then, 42 cannot represent the total number of children in the class.

    Hence, the answer is (3) 42.

    Anurag Mishra Professor Answered on 12th October 2015.
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