In this lesson I go over three key concepts in Number Theory that have been tested in different forms on the GMAT. I have created this video for students who are targeting a high score of Q51 on the GMAT quantitative reasoning section.
The links below take you to the questions from Official GMAT sources that are relevant to the concepts discussed in this video. Please note that Link 1 and Link 2 are from the database of questions in GMAT Exam 1 and Exam 2 (the two free exams from GMAC on mba.com), and you should not attempt these unless you have already taken those two tests.
Link 1 From GMAT Exam 1 and 2: Factorial divisibility
Link 2 From GMAT Exam 1 and 2: Prime factor of a large number
Link 3 GMAT Official Guide 2022 Problem Solving 148 (PS02704) also present in older guides