MBA Exam

How many factors of N=1020 will be divisible by 5 but not by 15?

1) 6
2) 3
3) 12
4) 0
5) 2

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MBA Other Question

If A and B are the roots of the equation x^2 -x +1 =0,then the value of A^16 -B^32 is :

1) 1
2) -1
3) 0
4) 2
From a pool set of 16 balls, some balls were selected.In case where order matters, balls were selected in 3360 ways.And in case , where order doesn't matter, balls were selected in 560 ways..How many balls were selected.??

1) 6
2) 8
3) 4
4) 3