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UPSC Civil ServicesPrelims2023General Studies Paper II (CSAT)
Question
QQ15. Consider the following in respect of prime number p and composite number c. 1. (p + c)/(p – c) can be even. 2. 2p + c can be odd. 3. pc can be odd. Which of the statements given above are correct ?
Options
- A 1 and 2 only
- B 2 and 3 only
- C 1 and 3 only
- D 1, 2 and 3
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Correct Answer
D 1, 2 and 3
Model Answer
Answer: option D, as per UPSC's final answer key (Series A).