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19 June, 21:31

The science department buys the equipment shown in the table. they all bought three items this year. in how many years will they have to buy all three items again

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  1. 19 June, 22:35
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    5*4=20

    4*5=20

    2*10=20

    So, the LCM (least common multiple) is 20

    Answer:They will have to buy all 3 every 20 years.
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