I was looking through some of the old-school X-Men comics the other day, you know, the first set by Stan Lee and Jack Kirby? I noticed something odd, though: Iceman's age is the only stated age. At no point in the first couple of issues did I see an age for Cyclops, Beast, Angel, Marvel-Girl; not even one for Professor X. Am I missing something here, or are the original ages just plainly never stated? Help would be greatly appreciated.
The ages of the characters were never plainly stated, at least not in the original run of X-MEN (before they became all-new, all-different, or uncanny). Based on the back-up stories from later issues in the series (running from issue 38 (Oct 1967) through 57 (June 1969)) that detailed how each of the original five (except Marvel Girl) met Xavier and joined the team, the characters would seem to be in high school when they first appeared.
Hank McCoy somehow got a college degree without seeming to have taken time out to go to college (he's employed as a scientist by the early 1970's; Bobby Drake is shown in college a decade later). However, as Hank's clearly something of a genius, he may have been doing collegiate work via Xavier's school, even if the others were getting high school diplomas.
It's clearly intimated that Bobby is the youngest of the five in those early appearances, but not by a significant degree.