Instructions

What will come in place of the question mark (?) in each of the following number series.

Question 126

8, 5.5, 8.5, 23, 89.5, ?

Solution

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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