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OpenStudy (anonymous):

How many 3 digit positive integers N are there, such that N is a multiple of both 7 and 13?

OpenStudy (anonymous):

interesting for eg How many 3 digit positive integers N are there, such that N is a multiple of both 3 and 5? first we multiply both 3 x 5 = 15 so the new question becomes How many 3 digit positive integers N are there, such that N is a multiple of 15?

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