This post is the fourth in our series on using strategies to answer specific questions from the 2018 Official Guide. Here, one of our most experienced GMAT tutors, John Easter, analyzes a question about distance-rate.

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## John Easter

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## 2018 Official Guide to the GMAT Review Series: Problem #23 (Algebra Distance-Rate Problems)

Posted by John Easter on August 31, 2018 2:43:00 PM CDT

Tags: GMAT quant, GMAT tutor, GMAT prep, GMAT Blog, MBA Admissions, online gmat tutor, gmat study skills, gmat math

## 2018 Official Guide to the GMAT Review Series: Problem #17 (Direct Calculation)

Posted by John Easter on August 29, 2018 2:42:42 PM CDT

This post is the third in our series on using strategies to answer specific questions from the 2018 Official Guide. Here, one of our most experienced GMAT tutors, John Easter, analyzes a question about direct calculation.

Read MoreTags: GMAT quant, GMAT tutor, GMAT prep, GMAT Blog, MBA Admissions, online gmat tutor, gmat study skills, gmat math

## 2018 Official Guide to the GMAT Review Series: Problem #44 (Problem Solving - Prime numbers)

Posted by John Easter on July 23, 2018 9:55:00 AM CDT

Problem #44 of the 2018 Official Guide to the GMAT states that if n is a prime number greater than 3, what is the remainder when n^2 is divided by 12?

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## 2018 Official Guide to the GMAT Review Series: Problem #167 (Back solving Variable in Choices)

Posted by John Easter on July 16, 2018 10:25:00 AM CDT

in this series, one of our most experienced GMAT tutors, John Easter, applies useful strategies to answer questions from the 2018 Official Guide.

Problem #167 of the 2018 Official Guide to the GMAT states that four extra-large sandwiches of exactly the same size were ordered for m students where m>4. Three of the sandwiches were evenly divided among the students. Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students. If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich?

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If you don't know what Khan Academy is, watch this. When it comes to GMAT prep, using Khan Academy can be a very effective tool for refreshing basic skills, but there's a catch. KA content is aligned to the common core state standards for math. The GMAT is NOT aligned to the common core.

Read More## GMAT Quant Strategies: Summing an Arithmetic Sequence

Posted by John Easter on May 15, 2013 8:18:00 AM CDT

One of the more difficult **GMAT problem types** deals with summing an arithmetic sequence. Problem 157 in the 12th edition Official Guide is an example:

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