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Two rulers are the same length. Ruler A is divided into 357 units while ruler B is divided into 255 units The rulers are placed side by side with the 0 marks lined up and the 375th mark of ruler A aligned with the 255th mark of ruler B. How many total places will the marks on the rulers be aligned?

  • math -

    357A = 255B
    A/B = 255/357 = 5/7

    A - B
    5 7
    10 14
    15 21
    ...
    255 357

    there will be 52 of those line-ups , obtained by 255/5 = 51, or 357/6 = 51, plus the line-up at the zeros

  • algebra -

    A ruler measures length to the nearest 0.25 inches. Which is the most appropriate way to report length using this ruler?

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