01質因數分解和短除法02質因數(選擇01)

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01質因數分解和短除法02質因數(選擇01)

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(1) 下面整數中，哪一個不是176的因數？

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(2) 下面哪一個數不是42的因數？

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(3) 3的因數有幾個？

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(4) 30的因數中，哪一個不是質數？

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(5) 75的因數中，共有幾個比1大且是5的倍數的數？

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