Board Thread:Speculation House/@comment-27087508-20180218065333/@comment-4010415-20180218070711

Technically, Lionheart said that the Spring Maiden ran off over a decade ago, so it was more than 10 years.

Qrow and Raven are most likely 38 or 39 at the youngest.

Students start their first year of Huntsman academy at age 17, unless they skip a year or two like Ruby. Though, Raven said that the reason she and Qrow were the ones chosen to attend Beacon is because they were "the right age", so we can assume they started the academy at age 17.

While explaining partners in Volume 1, Ozpin said they would be attending the academy for 4 years. (He said they'd be partners for the duration of their time at Beacon, then said whoever they make eye contact with would be their partner "for the next four years". Link the statements together.) 17 + 4 = 21, so students graduate at about age 21.

While showing off the STRQ photo in Volume 3, Qrow said that their team graduated, so one can assume Raven stuck around until at least 21, due to the fact that their team graduated. Considering Yang said that Raven left shortly after giving birth to her, it's most likely that 21 was the youngest possible age at which Raven gave birth to Yang.

In Volumes 1-3, Yang was 17, so if you do the math of 21 + 17, you get 38, meaning Raven was most likely 38 at the youngest in Volumes 1-3. Yang may be 18 starting in Volume 4 or 5.

TL;DR The math using info we had even before the whole Spring Maiden thing says that Qrow and Raven were most likely 38 at the very youngest in Volumes 1-3 and probably turned 39 in either Volume 4 or Volume 5.