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UPSC Civil ServicesPrelims2023General Studies Paper II (CSAT)
Question
QQ28. Each digit of a 9-digit number is 1. It is multiplied by itself. What is the sum of the digits of the resulting number ?
Options
- A 64
- B 80
- C 81
- D 100
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Correct Answer
C 81
Model Answer
Answer: option C, as per UPSC's final answer key (Series A).