- A123
- B234
- C345
- D453
Step-by-Step Solution
Digit sums: 123 -> 6, 234 -> 9, 345 -> 12, 453 -> 12. Only 234 has digit sum 9, a multiple of 9.
Answer: B) 234
The digit sum of 36 is 3 + 6 = 9, and 36 is a multiple of 9. Which of these numbers is also a multiple of 9 by the digit-sum test?
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