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If all multiples of 3 and all multiples of 4 are removed from the list of whole numbers 1 through 1200, then how many whole numbers are left?

 Dec 20, 2021
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300 multiples of 4     400 multiples of 3    

       100 multiples of 12  (these are counted twice)

 

1200 - 400 - 300 + 100 = 600 left

 Dec 20, 2021

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