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Question

In each of the following questions, a number series is given. After the series a number is given followed by (a), (b), (c), (d) and (e). You have to complete the series starting with the number given following the sequence of the given series.  

2              3.5          11.5        44           192.5     988

9                a              b             c              d             e            

What would come in place of d?

A 360.5 Correct Answer Incorrect Answer
B 330 Correct Answer Incorrect Answer
C 460.5 Correct Answer Incorrect Answer
D 520.5 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

The above series go in the following sequence. 2 × 1 + 0.5 + 1² = 3.5 3.5 × 2 + 0.5 + 2² = 11.5 11.5 × 3 + 0.5 + 3² = 44 44 × 4 + 0.5 + 4² = 192.5 192.5 × 5 + 0.5 + 5² = 988 Hence, the resulting series would be: 9         10.525.5         86       360.51828

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