Question
Which single digit should replace the blank in the number 1_36 so that the number is divisible by 9?
This question was previously asked in
RRB NTPC 2025 Graduate CBT 2 Question Paper PDF (10-Jul-2026) (Shift 1)
The correct answer is
8
Digit sum of 1_36: \(1+\_+3+6 = 10+\_\). For divisibility by 9, this sum must be a multiple of 9.
The nearest multiple of 9 reachable is 18, giving \(10+\_=18 \Rightarrow \_=8\).
Hence, the digit 8 should replace the blank.
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