Div 6 - How many positive integers between 200 and 300, inclusive, are not divisible by 2, 3 or 5?

My name is Dan and I offer elite, pay-as-you-go GMAT and GRE tutoring in NYC and online. Check me out at www.g-m-a-t.com
or look for more on my channel ‪@danthegmatman1832‬

[@jontyActs]

Thanks man appreciate it.

[@danthegmatman1832]

Glad to help

[@trying1407]

What is this concept called?

[@danthegmatman1832]

I would call it a combination if number theory and overlapping sets- really just counting how many multiples of something are in a range and being careful about overlap and double counting

[@trying1407]

@@danthegmatman1832 Does it not have a specific name? Where can I find lessons and practice to master it?

[@danthegmatman1832]

@@trying1407 search for this problem on gmat club and then at the bottom of that page they will have a bunch of others like it. Or I can teach you how