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UPSC Civil ServicesPrelims2025General Studies Paper II (CSAT)
Question
QQ29. Let PQR be a 3-digit number, PPT be a 3-digit number and PS be a 2-digit number, where P, Q, R, S, T are distinct non-zero digits. Further, PQR − PS = PPT . If Q = 3 and T < 6, then what is the number of possible values of (R, S) ?
Options
- A 2
- B 3
- C 4
- D More than 4
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Correct Answer
B 3
Model Answer
Answer: option B, as per UPSC's final answer key (Series A).