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    What will be the greatest number 32a78b, which is divisible by 3 but NOT divisible by 9? (Where a and b are single digit number) .
    Question

    What will be the greatest number 32a78b, which is divisible by 3 but NOT divisible by 9? (Where a and b are single digit number) .

    A.

    324781

    B.

    329787

    C.

    326787

    D.

    329784

    Correct option is D

    The number should be divisible by 3 is the sum of the numbers should be divisible by 3
    The number should be divisible by 9 is the sum of the numbers should be 9
    Again all the numbers divisible by 9 should be divisible by 3
    then
    Among the given options the sum of digits of option 1 , 2 and 3 is divisible by 9
    But the sum of digits of of option (d) is 3 + 2 + 9 + 7 + 8 + 4 = 33 which is not divisible by 9 but divisible by 3

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