New Workshop on Job Profile of RBI Grade B Officer by Susheel Ragade sir
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Question

What should come in place of the question mark (?) in the following number series?

21, 63, 315, ?, 19845, 218295

A 2205 Correct Answer Incorrect Answer
B 2116 Correct Answer Incorrect Answer
C 2330 Correct Answer Incorrect Answer
D 2575 Correct Answer Incorrect Answer

Solution

21 × 3 = 63 63 × 5 = 315 315 × 7 = 2205 2205 × 9 = 19845 19845 × 11 = 218295

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