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28 August, 16:56

every 3 days William has to take medication for his back. Every 7 days he has to take medication for asthma. On what day will William take both medications?

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  1. 28 August, 20:19
    0
    Okay, well we're gonna find the LCM (least common multiple)

    3: 3, 6, 9, 12, 15, 18, 21

    7: 7, 14, 21

    So ... 21 days
  2. 28 August, 20:41
    0
    It's the second Saturday that he would take both medications
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