Hi! Thanks for your message. In your Training Type book, typically on page 2, we provide a link to an exclusive website that provides additional, free supplemental material to students who own a PowerScore publication. For the Training Type books, we include a detailed answer key, which will tell you from which Preptest each question is sourced. From there, you will know exactly where to locate the forum post relevant to that question. For instance, the first question in Chapter One of the LR Question Type Training book is from June 1991, LR1, #3. In the forum, you will find the post under the LSAT Logical Reasoning Section, PrepTest 1 - June 1991 - LSAT Answers and Explanations - LR, Section 3 (which is the first LR section of that test), and you'll locate a for #3:
https://forum.powerscore.com/lsat/viewtopic.php?t=7402.
Please let us know if you have any additional questions!