DS Challenger Series

#1 If T - S = L - S , does it mean that the T equal L ?
(1) T> 0, L> 0
(2) S <0


#2M, K negative integers. Which of the following must be true?
A. m ^ k <0,
B. m ^ k is an integer
C. m ^ k <= 1



#3 7^n divided by 5 , what is the remainder ? (N, m are positive integers)
(1) n = 4m+1
(2) n = 2m + 3

Please give your answers and explanation in comments.

P.S : OA in comments

Ref: Oct Goodies

3 comments:

Rinkesh Arondekar 23/5/09 1:11 AM  

#1. We don't need any of the given statements. T=L in all cases.

#2. Only C is true.

#3. (1) alone is sufficient.

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