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Find-the-number-of-positive-integers-less-than-or-equal-to-300-that-are-multiples-of-3-or-5-but-are-not-multiples-of-10-or-15-




Question Number 16880 by Tinkutara last updated on 27/Jun/17
Find the number of positive integers  less than or equal to 300 that are  multiples of 3 or 5, but are not  multiples of 10 or 15.
$$\mathrm{Find}\:\mathrm{the}\:\mathrm{number}\:\mathrm{of}\:\mathrm{positive}\:\mathrm{integers} \\ $$$$\mathrm{less}\:\mathrm{than}\:\mathrm{or}\:\mathrm{equal}\:\mathrm{to}\:\mathrm{300}\:\mathrm{that}\:\mathrm{are} \\ $$$$\mathrm{multiples}\:\mathrm{of}\:\mathrm{3}\:\mathrm{or}\:\mathrm{5},\:\mathrm{but}\:\mathrm{are}\:\mathrm{not} \\ $$$$\mathrm{multiples}\:\mathrm{of}\:\mathrm{10}\:\mathrm{or}\:\mathrm{15}. \\ $$

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