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UPSC Civil ServicesPrelims2022General Studies Paper II (CSAT)
Question
QQ66. Let p be a two-digit number and q be the number consisting of same digits written in reverse order. If p × q = 2430, then what is the difference between p and q?
Options
- A 45
- B 27
- C 18
- D 9
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Correct Answer
D 9
Model Answer
Answer: option D, as per UPSC's final answer key (Series A).