Error. Log for the GMAT Official Guide 2025 - 2026 
The Official Guide 2025-2026 is a great resource - it has real GMAT questions, all questions are arranged in order of difficulty, good explanations, etc but it has one major flaw - no way to easily locate or specific questions or ability to target a specific area. This Guide attempts to correct that flaw (and a little bit more), making Official Guide even better by providing an automatic logging of questions along with analytics.
Huge thanks to
kingbucky,
Bunuel,
samhitaram22 who who have selflessly gone through every single question and made this guide possible

Thank you
hr1212 for help with analytics
Main Official Guide 2025-2026 Error-Log: https://docs.google.com/spreadsheets/d/ ... sp=sharingQuantitative OG 2025-2026 Error-Log: https://docs.google.com/spreadsheets/d/ ... sp=sharingData Insights OG 2025-2026 Error-Log: https://docs.google.com/spreadsheets/d/ ... sp=sharingVerbal OG 2025-2026 Error-Log:https://docs.google.com/spreadsheets/d/ ... sp=sharingExcel Version of the Main OG is attachedAttachment:

Use this guide to:
- Find Difficulty about every question available in the-Official Guide for GMAT Review
- Help find specific practice questions and build your custom practice tests that focus on your weak areas
- Keep your OG Practice in one place with an Error Log and Analytics
- Use it as a companion with the Official Guide and the question bank online - there is a nice reference to easy find and mark the questions you have attempted using the ID's
- Understand difficulty of each question (it is not very linear as you will notice). We have split difficulty into 4 groups (easy, medium, hard, and very hard). This split is based on the percentile of the question difficulty as determined by GMAT Club Timer sessions
Some notes about the 2025 - 2026 GMAT Guide: - The book has 802 questions. The online question bank has additional questions not found in the book (there are some RC, CR, DS, and PS)
- MSR and G&T questions are only available online; they are listed at the end as there is no numbering officially for them, only ID's.
- There is a typo in the Question ID's for DS in the book (they are one off compared to the online question bank)
- One of the RC questions has changed the answer which was odd or may be a typo but we have updated it on GMAT Club
- There are very very few truly new questions. Most of the new questions added are older questions from previous version of the GMAT Pre, EA practice questions, and other sources. So while there are over 100 new questions in the book that were not present in the 2024-2025 edition, the actual number of truly new questions is hovering around 11. All of the questions are marked in the spreadsheet.
Errata (known mistakes and issues)
- RC Question 563 (102088) answer key says D (page 500) but the correct answer is actually B
PS. If you find any issues with the file, please post here or PM me.