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$$N$$ is the units digit in the 3-digit positive integer $$45N$$ and is the tens digit in the 3-digit positive integer $$2N7$$. If the sum of the two 3-digit integers has $$7$$ as the hundreds digit, what is the least possible value of $$N$$?
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· 相关考点
1.1.1 数位与数值
以上解析由 考满分老师提供。
