MBA Exam

It is given that x^2 + y^2 = z + 1, y^2 + z^2 = x + 1, z^2 + x^2 = y + 1. Find xyz.

1) 1
2) -1/8
3) 1 or 1/8
4) 1 or -1/8
5) NOT

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MBA Other Question

How many four-digit numbers, having distinct digits, using the digits 1, 2, 3, 4 and 5 can be formed such that the numbers formed are divisible by each of the digits used in the number?

1) 1
2) 2
3) 4
4) None of these
Find the least value of k (positive integral number) for which

1) 5
2) 4
3) 3
4) 11
5) 13