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Discussion

  1. If n is any odd number greater than 1, then n( n2 -1 ) is
    1. divisible by 96 always
    2. divisible by 48 always
    3. divisible by 24 always
    4. None of these
  1. Correct Option: C

    Solving the question by taking two odd numbers greater than 1 i.e. 3 and 5,
    for n =3, n( n2 -1 ) = 3( 9 - 1) = 24
    for n = 5 n( n2 -1 ) = 5( 25 - 1) = 120

    Using option we find that both the number are divisible by 24.


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