- #1
Juwane
- 87
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Two questions:
1. We add the digits of any number. If the sum is divisible by 3, then that number is divisible by 3. Why?
2. Does this work for a number of more than 2 digits?
1. We add the digits of any number. If the sum is divisible by 3, then that number is divisible by 3. Why?
2. Does this work for a number of more than 2 digits?