MBA Exam

If n is any odd number greater than 1, then n(n^2 – 1) is always divisible by(A) 6 (B)24 (C) 48 (D) None of these [CAT 1996]explain why

1) 6
2) 24
3) 48
4) not

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MBA Other Question

How many natural numbers less than 1000 can be expressed as the difference of squares of whole numbers in at least one way?Plz explain

1) 500
2) 749
3) 100
4) 400
How many AP's can be formed from the set S = {1...1000} that start with 1 and end with 1000 and have at least 3 elements?

1) 4
2) 3
3) 7
4) 6
5) 8