Hello578 Hello578

09-04-2017
Mathematics

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Megan is taking piano lessons and gymnastics lessons. She has piano lessons every 7 days and gymnastics every 3 days. How often does she have both on the same day?

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12345678o1234 12345678o1234

09-04-2017

every 3 weeks=21 days. this is because 21 is the lowest common factor of 7 and 3

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CamomilleTea CamomilleTea

09-04-2017

She has both in the same day every 21 days :)

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