<p>OK, so I've taken a lot of AP classes (13) and I can't report any more than 10 scores on the Common App. The thing is I don't really want to report any more than 10, because the oldest 3 weren't particularly good (4,4,3). Will it look suspicious if I only report 10 and don't use the Additional Information section of my application to say the others?</p>
<p>No, I did the same.
Since they aren’t technically required to mention until you want credit for them, any of the ones you do provide can only help you.
But, that being said, mentioning the 4s can still help you (maybe not so much the 3, but if the 4s were in a tough course, it could still show more than enough proficiency)</p>