WeBWorK using host: https://webwork-dev.aimath.org, format: simple, seed: 40, course: anonymous

For how many $n \in \{1,2, \ldots, 500\}$ is $n$ a multiple of one or more of 5, 6, or 7?

Hint

To find out how many numbers are divisible by 6 and 7, for example, take $500/42$ and round down.