What was the units digit of 1713-17?

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问题 What was the units digit of 17¹³-17?

选项 A、0
B、4
C、6
D、2
E、1

答案A

解析 13=4×3+1，所以17¹³的个位数字和17¹相同，所以17¹³-17的个位数是0，答案选A。

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