In preparation for exams: question bank or questions with omitted particulars?

I have been doing a little bit of experimenting when it comes time to review with the class in preparation for the final exam. The last handout I have been giving my students has usually been a compilation of problems similar to the ones they have been accustomed to seeing throughout the course. Through the use of textbooks, I can save some time by not having to come up with the questions myself, but the textbooks sometimes do not use the same language that I use in class or on prior written assignments. Recently, I have been considering the option of either:

A) a list of twenty-five possible questions, out of which eight to ten will be on the final exam, or
B) the exact eight to ten questions that will be on the final exam, with the particulars blacked out (particulars being numbers, equations, functions, etc.).

Benefits of A:

• allows students to strengthen all core skills required to say that they have a satisfactory understanding of all course material
• if all twenty-five questions are completed to perfection, the student should have no problem reiterating the solution come exam day (barring test anxiety, time management problems, and other factors)
• hedging bets (we all know this problem when we studied stats): what is the minimum number of questions I should be completely clear on how to do if I want to have a good chance of scoring at least an $$80\%$$, etc.

Benefits of B:

• allows students to focus solely on the exact type of question they should expect
• gives students the opportunity to predict how much time should be spent for each question, and, by extension, how much time can be spent studying for each topic

To current students: if you were given the option, which would you prefer? Can you think of other ways that each option can benefit you?

To teachers: which option have you personally used with your students before? If neither, do you see yourself employing either of these methods when it comes to exam preparation for your students?

• @Namaste I imagine that your comment suggests that 25 question is too many -- when I wrote 25, I suppose that number was arbitrarily chosen, but I do have this idea that there has to be a sufficient number of potential questions given the number of questions there actually are going to be on the exam. Of course, none of these numbers are yet set in stone (though there must be a minimum number of questions that will be on the exam). In your experience, do you feel 8 to 10 out of 15 would be more beneficial compared to 8 to 10 out of 25? Oct 18, 2019 at 22:04
• And I am definitely not suggesting that my two options are the only two options. I have gone through a number of different types of exams (e.g. "here are $x$ questions, do all of them" or "here are $x$ questions, do $y$ of them" or "do two from section A, three from section B"). But, as it pertains to the two options that I have described, is there one that, in people's opinion, works better? Oct 18, 2019 at 22:07
• I believe that at least some of the recent "specs grading" trends look something akin to B, though there are other differences in the goals of exams. This is an interesting question. Oct 18, 2019 at 22:15
• "B" seems a bad option, but it depends on your goals. "A" seems to be testing (1) diligence and (2) the ability to regurgitate answers that have been figured out by someone, perhaps someone else; and (3) failing (1) or (2), the ability to apply course concepts in solving problems for which they have been (perhaps) adequately prepared to do on a timed test. While "A" has significant shortcomings, I've used it before in a limited way (~1/3 of the test was from the set of problems) because I've witnessed its effect on good students. They worked hard, even if helping each other, to understand. Oct 21, 2019 at 1:23
• Does your exam involve any thinking (e.g. proofs), or only calculations and the application of algorithms? I don't see how proof, where you actually need an idea, would work under either A or B.
– Dirk
Oct 21, 2019 at 12:29