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UPSC Civil ServicesPrelims2025General Studies Paper II (CSAT)
Question
QQ27. Let both p and k be prime numbers such that (p^2 + k) is also a prime number less than 30. What is the number of possible values of k ?
Options
- A 4
- B 5
- C 6
- D 7
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Correct Answer
B 5
Model Answer
Answer: option B, as per UPSC's final answer key (Series A).