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Question

n each of the questions given below, there is a mathematical series. After the series, a number is given followed by (a), (b), (c), (d) and (e). You have to create another series after understanding the sequence of the given series which starts with the given number. Then, answer the question given below.
4 5 9.75 23.5
7 (a) (b) (c) (d) (e)
What number would come in the place of (d)?


A
32.5
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B
271.5
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C
8
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D
14.25
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E
None of these
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Solution

The correct option is E None of these
The series is × 1 + 1, × 1.5 + 2.25, × 2 + 4, × 2.5 + 6.25, × 3 + 9, ...
a = 7 × 1 + 1 = 8,
b = 8 × 1.5 + 2.25 = 14.25
c = 14.25 × 2 + 4 = 32. 5,
d = 32.5 × 2.5 + 6.25 = 81.25 + 6.25 = 87.25.

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