Boost your GMAT Quant Score
Try the following GMAT Problem Solving question on finding prime factors of a summation.
Question 52:
If $S$ is the sum of the first fifty positive integers, then what is the sum of all the distinct prime factors of $S$ ?
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.
In this video lesson I discuss how the GMAT tests the properties of products of consecutive integers. I have created this video for students who are targeting a high score on the GMAT quantitative reasoning section, specifically for those targeting a score of Q51.
In this video I discuss how GMAT data sufficiency questions trap a test taker and what you can do to avoid the traps.
Try the following GMAT Problem Solving question on conditions under which algebraic expressions are undefined.
Question 51:
For what real values of $x$ is the expression $\dfrac{3(x+3)}{(x-1)(x+2)}$ not defined ?