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23 June, 10:22

Ronald and Tim both did their laundry today. Ronald does laundry every 66 days and Tim does laundry every 99 days. How many days will it be until Ronald and Tim both do laundry on the same day again?

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  1. 23 June, 10:46
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    Day 198

    Step-by-step explanation:

    Where 66 and 99 have a common multiple will be the day they meet. The multiples of 66 are 1, 66, 132, 198 ... The multiples of 99 are 1, 99, 198, ... 198 is a multiple of both. They will both do laundry on day 198.
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