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17 March, 17:36

You buy a lily in African violet on the same day you are instructed to water the lily every fourth day and water the violet every 7th day after taking them home what is the first day on which you will water both plants on the same day

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  1. 17 March, 17:43
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    The LCM (least common multiple) of 4 and 7 is 28 so it won't be until the 28th day

    4,8,12,16,20,24,28

    7,14,21,28 you can see that 28 is the first "shared" number when counting by fours and counting by sevens.
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