What will come in place of the question mark in the series below?
3, 5, 15, 45, 113, ?
Ans. 5 = 3 + (13 + 1)15 = 5 + (23 + 2)45 = 15 + (33 + 3)113 = 45 + (43 + 4)? = 113 + (53 + 5), i.e. ? = 243
Which number will fit in '?' place in the following series?
12, 23, 45, 89, ?
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