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17 January, 10:27

The science department buys microscopes every 5 years, safety goggles every 4 years, and test tubes every 2 years. They bought all three items this year. In how many years will they have to buy all three items again.

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Answers (2)
  1. 17 January, 11:49
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    In 20 years they will buy all three items again
  2. 17 January, 13:15
    0
    11 because I have to add all the years/number up
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