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UPSC PYQPrelims 2025

Civil Services Examination · Question 48

What is the 489th digit in the number 123456789101112...?

  1. 0
  2. 3
  3. 6
  4. 9
Show answer & explanation

Answer: (D) 9

Explanation

1-9 use 9 digits and 10-99 use 180 (total 189). The remaining 300 digits cover 100 three-digit numbers (100 to 199), so the 489th digit is the last digit of 199: 9. (Answer as per the official UPSC answer key.)