Answers
GMAT Quant practice questions - Number Properties (Fundamentals)
- Course
- Institution
This document contains 100 GMAT practice questions for: - Number Properties (Fundamentals)
[Show more]
Seller
Follow
jasperhoogendoorn
Reviews received
Content preview
GMAT Number Properties: FundamentalsJeff Sackmann / GMAT HACKS
January 2013
Contents
1 Introduction 2
2 Difficulty Levels 3
3 Problem Solving 4
4 Data Sufficiency 14
5 Answer Key 20
6 Explanations 23
1
, Jeff Sackmann
www.gmathacks.com
1 Introduction
This document contains nothing but GMAT Number Properties questions–100
of them, to be exact. Number Properties is one of the most challenging topics
on the test, since many questions can’t be solved algebraically. There are plenty
of techniques you can learn to make these questions more clear-cut (and those
are discussed in the explanations), but most test-takers never learn them.
As in all of my GMAT preparation resources, you’ll find these questions
indexed by difficulty.
For further, more specific practice, I have produced several other resources
that may help you. I’ve also created a 100-question set called ”Exponents and
Roots,” which covers exactly that material, including dozens of questions that
force you to master every last exponent-related rule the GMAT will test you
on. You’ll also find many Number Properties questions in my general sets,
”Problem Solving: Fundamentals” and ”Data Sufficiency: Fundamentals.”
Also, Total GMAT Math has several chapters (along with focused practice)
on Number Properties and related issues, including individual chapters on prime
numbers, factors, multiples, evens and odds, consecutive numbers, and more. If
you find you are struggling with the mechanics of these problems, your time is
probably better spent with Total GMAT Math than in doing dozens and dozens
of practice problems, hoping to pick up those skills along the way.
As far as strategy is concerned, there are dozens of articles at gmathacks.com
to help you with your strategic approach to Arithmetic questions. Most impor-
tantly, you should make sure you understand every practice problem you do. It
doesn’t matter if you get it right the first time–what matters is whether you’ll
get it right the next time you see it, because the next time you see it could be
on the GMAT.
With that in mind, carefully analyze the explanations. Redo questions that
took you too long the first time around. Review questions over multiple sessions,
rather than cramming for eight hours straight each Saturday. These basic study
skills may not feel like the key to GMAT preparation, but they are the difference
between those people who reach their score goals and those who never do.
Enough talking; there are 100 Number Properties questions waiting inside.
Get to work!
2
Copyright 2008-13 Jeff Sackmann
www.gmathacks.com
, Jeff Sackmann
www.gmathacks.com
2 Difficulty Levels
In general, the level 5 questions in this guide are 500- to 560-level questions.
The level 4 questions represent a broad range of difficulty from about 380 to
500.
Moderately Easy (4)
PS
3, 4, 7, 12, 16, 18, 20, 21, 27, 33, 38, 43
DS
46, 47, 48, 54, 59, 60, 61, 62, 65, 67, 69, 70, 72, 75, 77, 81, 85, 88, 89, 93, 94,
95, 96, 97, 98, 100
Moderate (5)
PS
1, 2, 5, 6, 8, 9, 10, 11, 13, 14, 15, 17, 19, 22, 23, 24, 25, 26, 28, 29, 30, 31,
32, 34, 35, 36, 37, 39, 40, 41, 42, 44, 45
DS
49, 50, 51, 52, 53, 55, 56, 57, 58, 63, 64, 66, 68, 71, 73, 74, 76, 78, 79, 80, 82,
83, 84, 86, 87, 90, 91, 92, 99
3
Copyright 2008-13 Jeff Sackmann
www.gmathacks.com
, Jeff Sackmann
www.gmathacks.com
3 Problem Solving
Note: this guide contains both an answer key (so you can quickly check your
answers) and full explanations.
96+n
1. For which of the following values of n is n NOT an integer?
(A) 4
(B) 8
(C) 9
(D) 12
(E) 16
2. When n is divided by 9, the result is an integer, and when 441 is
divided by n, the result is an integer. If 9 < n < 441, what is the
value of n?
(A) 147
(B) 121
(C) 63
(D) 49
(E) 27
3. The sum of prime numbers that are greater than 50 but less than
60 is
(A) 59
(B) 110
(C) 112
(D) 163
(E) 169
4. What is the probability that a random number selected from the
set of integers 101 through 450, inclusive, has a hundreds digit
of 3?
1
(A) 4
2
(B) 7
2
(C) 9
99
(D) 350
100
(E) 349
4
Copyright 2008-13 Jeff Sackmann
www.gmathacks.com
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jasperhoogendoorn. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.20. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
49768 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now