MBA Exam

The sum to infinity of the series (1)^-1 + (1+2)^-1 + (1+2+3)^-1 +.......... is??

1) 0
2) 1
3) 2
4) 3

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MBA Other Question

Kapil wishes to pay Rs 255 with hundred notes. In how many ways can this task be performed if Kapil had hundred notes of value Re 1 and Rs 5 only?If sumone cud post the approach it wud be gr8

1) More tahn 100
2) More than 50 but less than 100
3) 50
4) 10
5) 0
EASIEST of all........if x^2=1and y^2=4then x*y=???

1) 1
2) 2
3) -2
4) none of these