On "Friends", what grade did Ross say he skipped?

On "Friends," Ross said he skipped fourth grade.

Ross makes the claim in "The One with Ross's Library Book," when a woman comments that he looks younger than she expected. Trying to explain his youthful appearance—and perhaps impress her—Ross replies that he skipped fourth grade. The line is a small character joke rather than a major part of his biography.

The episode aired during Season 7, when Ross is working at the museum and trying to protect his dissertation from becoming associated with sexual activity in the library stacks. His conversation with the woman occurs while he is patrolling the library, and his unusual answer fits the show's portrayal of Ross as both highly educated and socially awkward.

Some viewers question the claim because the series contains several inconsistencies in the characters' ages, school years and timelines. Ross's statements about his age and his time at school do not always align perfectly with later flashbacks involving Monica, Chandler and Rachel. Those continuity issues do not change the quiz answer: the grade Ross says he skipped is fourth grade.