[計量] 請教PP2一題
the "reflection" of a positive integer is obtained by reversing its digits.For
example,321 is the reflection of 321.The difference between a five-digit
integer and its reflection must be divisible by which of the following?
選項為:2
4
5
6
9
答案為9,
可以告訴我這題的意思嗎 ?? 疑惑中
感謝各位大大
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11/09 00:13, , 1F
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11/09 00:27, , 3F
11/09 00:27, 3F
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