MBA Exam

N = 1! - 2!+3! -4! +5! ........ +49! - 50!find the unit digit of N^N.Sorry for the last question..usme kuch locha ho gaya tha..

1) 1
2) 9
3) 7
4) None

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MBA Other Question

Given that: p, q, r are natural nos if p^4 + q^4 = r^4 which of the following
is always correct

1) either p is a prime or q is a prime
2) if p, q is a prime then r is also a prime.
3) p, qandr can never be primes.
4) option 1 and 2
5) option 2 and 3
for which of the following n is the number 274 +22058+22n is a perfect square?a)2012 b)2100 c)2011 d)2010

1) a
2) b
3) c
4) d