1.

The sequence of sets S_1, S_2,S_3,S_4,….. is defined as S_1 = {1}. S_2 = {3,5}, S_3 = {7,9,11}, S_4 = {13,15,17,19}….etc. The middlemost element of an odd numbered set S_(125) is:

Answer»

12500
15625
3125
none of these

Answer :B


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