If I have vocabulary test every 12 days and math test every nine days when will they fall on the same day again

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asked Jun 15, 2017 164k views

1 Answer

Brent Matzelle · Answer 1 · 2017-06-20T14:05:43+0000

After 36 Days.
36 is the lowest number that both 9 and 12 go into.

I found this in my head by thinking of multiples of 9 (starting with 9) until i found one that it also divisible by 12.

If I have vocabulary test every 12 days and math test every nine days when will they fall on the same day again

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