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Question

What should come in place of the question mark (?) in the given series? 195 201 213 231 255 ?

This question was previously asked in
RRB Group D 2025 Question Paper (18-Aug-2026) (Shift 1)
The correct answer is

285

Looking at the differences between consecutive terms: 201-195=6, 213-201=12, 231-213=18, and 255-231=24. These differences increase by 6 each time.

Following this pattern, the next difference should be 24+6=30.

Adding this to the last term: 255 + 30 = 285.

Hence, the correct answer is 285.

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