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The "reflection" of a positive integer is obtained by reversing its digits. For example, 321 is the reflection of 123 The positive difference between a five-digit integer and its reflection must be divisible by which of the following?
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· 相关考点
1.6.5 整除的定义与判定 1.1.1 数位与数值
以上解析由 考满分老师提供。
