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  • 2009 April(66F) Math Question 12

    Ratios, Proportions, Percentages, Fractions

    - LCM, GCF, Prime Numbers

    Choice J
    $$30=3\times10$$ $$20=2\times10$$ $$70=7\times10$$ $$[30,20,70]=2\times3\times7\times10=420$$

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