What will come in place of the question mark (?) in each of the following number series.
8, 5.5, 8.5, 23, 89.5, ?
The pattern followed is :
8 $$\times 1 - 2.5$$ = 5.5
5.5 $$\times 2 - 2.5$$ = 8.5
8.5 $$\times 3 - 2.5$$ = 23
23 $$\times 4 - 2.5$$ = 89.5
89.5 $$\times 5 - 2.5$$ = 445
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