RRB Group D (Level-1 posts) 2025 · Question 265 of 386

What should come in place of the question mark (?) in the given series? 18 24 12 30 ? 36

Answer: B. 6

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Source: RRB Group D 2024 Question Paper PDF (Dec 27, 2025) (Shift 1) · official-answer-key

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