Was it a PSI Exam? In the Dixie states, most state licenses go through PSI exams.
Having taken both the RE Agent exam and the GC Residential Basic exam, I can sympathize with your plight.
The questions are rarely 'trick' questions, but they are often 'tricky'. Study guides are not 100% true to the test, and so flash-carding the test beforehand will only get you so far (As you've learned)
A lot of people like to brag that they "COMPLETED MY TEST IN ONLY ONE HOUR! I HAD 4 HOURS LEFT! LOLOLOL!"... I think this is a mistake.
I have a great education from a damn hard school in a degree program that tended to flush people out. I am no stranger to taking hard tests (The longest final I ever took was about 6 hours)...
On every PSI exam I've taken, I'm careful to use up as much time as I darn well please. When I took the GC Exam, I was the last person from the morning session to leave the test center (I passed)
My strategy works like this... go through the test and answer the questions that match your flash-card questions. MARK any question that doesn't fit 100%... then come back to it.
On the second pass through the test, answer the low-hanging fruit questions first. The ones that will only take you a minute or so to figure out. MARK every other question.
Keep doing this... take your time. READ the question... then answer it... Then READ the question again to make sure that it is asking what you think it's asking.
After you've got an answer, unless another question points you at a different answer, resist the urge to go back and change your answers... sometimes a gut response is the correct response.
Most of all, take your time. You've got all the time in the world on these tests, so don't try and impress the guy next to you by blazing through the thing in 45 minutes, then walking out 2% shy of passing when you still had more than 3 hours on the clock.
Just my advice, YMMV.