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Mathematics

7th

grade

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1上 2-2 最大公因數與最小公倍數

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  • 1. Multiple Choice
    1 minute
    1 pt

    ab兩數,已知(a , b)=6,a×b=1260,求[a , b]=?

    60

    210

    420

    7560

  • 2. Multiple Choice
    1 minute
    1 pt

    ab為正整數,ab,若 ab=168,且[a , b]=45×(a , b),則ab=?

    52

    48

    39

    36

  • 3. Multiple Choice
    1 minute
    1 pt

    假如a=22×33×7、b=2×32×13、則下列敘述何者正確?

    甲、ab最小公倍數的質因數是2、3、7、13

    乙、ab的質因數個數相等

    丙、ab的最大公因數是24

    只有甲乙

    只有乙丙

    只有甲丙

    甲乙丙

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