Hi jbryant62.
While I am not all that familiar with the Guide For Quant Review, I can say that most of the quant questions in the Official guide are not as difficult as the ones that you would see if you were scoring in upper 40's to 50's in quant.
As a matter of fact, probably the level of difficulty of the questions that you saw in scoring 43 in quant on the practice test that you took is fairly consistent with the level of difficulty of some of the more challenging but maybe not the most challenging quant questions in the OG.
So the short answer to your question is that in achieving your score goal you will likely see some quant questions that are more challenging that the OG quant questions.
At the same time, the truth is that even at the highest levels of quant, the questions are often not that difficult to answer, and are often more tricky than complex.
Beyond that, here some tips for you.
Tip One: Do practice questions in as much time as you need to get them right. You need to learn to consistently get right answers, and taking your time when doing practice questions is the way to develop the skills you need in order to get them right consistently. As you develop those skills, you will naturally speed up.
Tip Two: Work on quant questions topic by topic. If you go over your practice tests, you will find that certain types of quant questions were somehow more challenging for you than others were. Of course, if you work on those most challenging types until they become easy for you, you will not only get them right, but also you will get them right faster, leaving yourself more time to work on other questions and helping you to finish the quant section on time. You already scored Q43. By getting better at handling just ten types of questions, you might be able to score well into the upper 40's in quant. If ten types are not enough, you can continue working on types until you hit your goal.
Here is a comprehensive list of quant question types, along with the frequencies in which they have appeared in some official practice tests.
https://gmatclub.com/blog/2012/04/breakd ... frequency/
Tip Three: To drive up your verbal score you need to see what's going on in the questions more clearly. How to achieve that vision? By working on verbal questions very carefully, seeking to prove each wrong answer wrong and each right answer right. If you can get 100% right taking twenty minutes per question, soon you will get most of them right taking two minutes per question. To the degree that you don't get 100% right taking twenty minutes per question, figure out for each question that you don't get what you had to see and what you had to do differently in order to choose the right answer rather than the wrong one.
Enjoy the game!!!
Most like UF.
