I took the AFOQT back in 1984 or '85 at Det 157 @ ERAU. All I can tell you is to go over the study guides. Although I didn't qualify for Pilot or Navigator, I scored high enough to qualify for an Engineer's slot. Still baffles me to this day.
Years later, I took the Army's OSB Test and scored 97 outta a possible 115 on the first take. Again, the study guides helped.
Good luck to you.
atp