What will come in place of the question mark in the series below?
7, 4.5, 5.5, 12, 49, ?
Ans. 4.5 = 7 x 0.5 + 15.5 = 4.5 x 1 + 112 = 5.5 x 2 + 149 = 12 x 4 + 1? = 49 x 8 + 1, i.e. ? = 393
Which number will fit in '?' place in the following series?
12, 23, 45, 89, ?
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