- A2
- B5
- C9
- D11
Step-by-Step Solution
If the digit sum is 9, the number is divisible by 9 (and by 3). It need not be even or end in 5, and need not pass the 11-test. So the guaranteed divisor is 9 (e.g. 18, 27, 36).
Answer: C) 9
A two-digit number has digits that add up to 9.
Such a number is always divisible by which of these?
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