- A9
- BIt varies
- C0
- D1
Step-by-Step Solution
Multiples of 9 have digit sums that are multiples of 9, and repeating the process ends at 9 (e.g. → 9; 99 → 18 → 9).
Answer: A) 9
What is the digital root of every multiple of 9 (other than 0)?
Class 8Parity, Remainders and Digital RootsNumber System
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