How many of the first 200 positive integers are multiples of neither 6 nor 15

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asked Apr 2, 2019 154k views

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Mlg · Answer 1 · 2019-04-06T15:49:58+0000

200 - 198/6(number of multiples of 6 smaller than 200) - 195/15(number of multiples of 15 smaller than 200) + 180/(lcm of 6 and 15) (number of multiples of both 6 and 15 smaller than 200) = 158

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How many of the first 200 positive integers are multiples of neither 6 nor 15

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