# GMAT Problem Solving POE – Broad Range

What worries GMAT test takers in Problem Solving is the lengthy calculations, and translation of statements to equations. Lot of students prefers the use of calculators. If you have started solving a few GMAT PS questions, you might have realized that solving some of the toughest GMAT 800 questions does not require even solving them in a traditional manner. Process of Elimination is an often-neglected technique when it comes to solving time consuming and tricky GMAT Problem solving questions.

In this article, we will cover how to classify answer choices into groups, and guess the probable range of the answer based on the facts provided in the question. In order to be successful with this strategy, find out how many answers are close to each other in value. Group them together, and then start with data substitution.

Let us look at an example:

Q) Tim and Phil together can complete the flooring on 2nd floor in 6 days. When Phil was on leave, Tim completed a similar flooring job in 18 days. How long will Phil take to complete flooring on 2nd Floor if Tim is unavailable.

a) 12 days
b) 22 days
c) 18 days
d) 7 days
e) 9 days

Although the question tries to mask the facts, if you read it carefully, the question is simple – what is the rate of completing flooring for Phil if Phil and Tim can do the task together in 6 days, and Tim alone can do the same task in 18 days.

Group 1 = {7, 9, 12}
Group 2 = {18, 22}

You cannot predict whether the answer choice will be from Group 1 and Group 2 just based on the number of answer choices in each group but if you have read the facts.

Fact 1:  Job Done together takes 6 Days
Fact 2: Job Done by Tim Alone takes 18 days

Clearly, Phil has to compensate Tim’s poor workmanship to meet the 6 Days completion rate.

Phil must complete the work in less than 18 days but more than 6 days

Range:  6-18 days.

Only Group 1 satisfies that range. Eliminate Group 2 or answer choices B and C

A Simple formula substitution shows that

1/t + 1/p = 1/10

1/20 + 1/p = 1/10

1/p =1/6 – 1/18

1/p= 12/108

P = 9 Days

You might ask why you have to think about the range of answers and groups. We have seen GMAT test takers making careless mistakes. When you know the probable and improbable range, these kinds of careless mistakes can be avoided.

1. Complete GMAT RC Questions in less than 1 minute and 50 seconds
3. Take Notes Effectively
4. Collect and Interpret Facts
5. Speed up Summary Creation
6. Remember Information
7. Question the Author

12. Learn to Answer GMAT organization of passage Question
13. Learn to identify the style/tone or attitude of the author

Mastering GMAT Critical Reasoning

After you read F1GMAT’s Mastering GMAT Critical Reasoning Guide, you will learn:

How to overcome flawed thinking in GMAT Critical Reasoning?

How to spot Inconsistencies in Arguments

How to eliminate out of scope answer choices using Necessary and Sufficient Conditions

How to Paraphrase GMAT Critical Reasoning Question

How to Answer Assumption Question Type

How to Answer Conclusion Question Type

How to Answer Inference Question Type

How to Answer Strengthen Question Type

How to Answer Weaken Question Type

How to Answer bold-faced and Summary Question Types

How to Answer Parallel Reasoning Questions

How to Answer the Fill in the Blanks Question

Get F1GMAT's Newsletters (Best in the Industry)

• Ranking Analysis
• Post-MBA Salary Trends
• Post-MBA Job Function & Industry Analysis
• Post-MBA City Review
• MBA Application Essay Tips
• School Specific Essay Tips
• GMAT Preparation Tips