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8 October, 17:54

You have piano lessons every 7 days and tuba lessons every 3 days. Today you have both lessons. In how many days will you have both lessons on the same day again

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Answers (2)
  1. 8 October, 18:28
    0
    I will have piano and tuba lessons on the same day in 21 days because 3 goes into 21 seven times.
  2. 8 October, 20:08
    0
    I think it's 21 because 3 • 7 = 21
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