SarkariPYQ

SSC Stenographer 2022 PYQ — Question 161

SSC Stenographer - 17 Nov 2022 - Shift 3 • Reasoning • Q161

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Which of the following numbers will replace the question mark (?) in the given series?

7, 9, 15, 45, 105, 235,?

Show answer & explanation

Correct answer: C

Explanation

The correct answer is option 3 i.e. 445.

Given series: 7, 9, 15, 45, 105, 235,?

The series follows this pattern:

7 + (13 + 1) = 9,

9 + (23 - 2) = 15, 

15 + (33 + 3) = 45, 

45 + (43  - 4) = 105, 

105 + (53 + 5) = 235

235 + (63 - 6) = 445 

So, the next term in the series is 445.