Which one is greater between the units digit of 7123 and the units digit of 3320?

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问题 Which one is greater between the units digit of 7123 and the units digit of 3320?

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答案7123个位为3。3320幂指数320除以4余0。既然3320与34个位相同,而34个位为1,因而3320个位为1,所以7123比3320个位大。

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