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22 August, 12:04

Ronald and Tim did their laundry today. Ronald does laundry every 6 days and Tom does laundry every 9 days. How many days will it be until Ronald and Tim do their laundry on the same day again?

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  1. 22 August, 12:20
    0
    Least common multiple question

    Ronald: count by 6's

    6, 12, 18, 24, 30, 36, 42, 48, 54 ...

    Tim: count by 9's

    9, 18, 27, 36, 45, 54,

    every 18 days they do their laundry together
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