Find all School-related info fast with the new School-Specific MBA Forum

It is currently 02 Oct 2014, 02:37

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

GMAT Sample Questions and solution tips

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

GMAT Sample Questions and solution tips [#permalink] New post 09 Apr 2014, 03:37
Concept tested: Even/Odd number
Question:If a is odd and b is even, is ab odd, or even?

Answer: xy is even
An odd number can be represented as 2n + 1, and an even number can be represented as 2n, where n is an integer.Multiplying 2n + 1 and 2n would yield 4n2 +2n, which is always even, since 2 is a factor of both terms.

Mantra: odd number times an even number is always even.
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

GMAT Sample Questions and solution tips [#permalink] New post 10 Apr 2014, 03:01
Concept tested: Exponents
Question: Calculate (-1)273

Answer: -1
–1 raised to any even power is 1 {eg (–1) × (–1) = 1}.
–1 raised to any odd power will equal –1 {eg (–1) × (–1) × (–1) = -1}.
Since, 273 is an odd number, so (-1)273= –1.

Mantra: (-1) raised to an even power is equal to 1 and (-1) raised to odd power is equal to +1
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

Re: GMAT Sample Questions and solution tips [#permalink] New post 11 Apr 2014, 02:22
Concept tested: Exponents and roots
Question: ( 7√x)7 = ?

a) x49 b) x c) X1/7 d) 1


Answer: x

( 7√x)7 = ( x1/7) 7= x(1/7)* 7 = x

Mantra: n√x can be written as x1/n
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

Re: GMAT Sample Questions and solution tips [#permalink] New post 01 May 2014, 03:32
Concept tested: Even/Odd numbers
Question: If x and y are both odd integers , what is x/y ?
a) Odd
b) Even
c) Can’t be determined

Answer: Can’t be determined

If x is divisible by y , then obviously then x/ y is an odd integer. But it is not given whether x is divisible by y or not. So, we can’t determine it with given information.

Mantra: Check whether outcome of a calculation is an integer or not , before deciding whether it can be even or odd.
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

Re: GMAT Sample Questions and solution tips [#permalink] New post 02 May 2014, 03:26
Concept tested: Exponents
Question: If xy < 0 , then x is
a) < 0
b) >0
c) Can’t be determined

Answer: < 0

If xy < 0 , then irrespective of the value of y , x is also negative.

Case 1 : x=2 , y =3 xy = 23 = 8 > 0
Case 2: x= -2 , y =3 xy = (-2)3 = -8 < 0

Mantra: If xy < 0 , x is also negative but it is not true vice versa. i.e if x < 0, then not necessarily xy < 0
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

Re: GMAT Sample Questions and solution tips [#permalink] New post 03 May 2014, 01:50
Concept tested: Unit Digit
Question: What is the units digit of (28)(34)(57)?
a) 3
b) 0
c) 5

Answer: 0

We need not multiply the entire numbers to find the unit digit. Multiplying 2 and 5 , we get 10 (unit digit ‘0’). Hence this number when multiplied by any nymber any number of times will yield ‘0’ as unit digit.


Mantra: When a number with ‘0’ in its unit digit is multiplied with any other number, unit digit will remain same i.e. ‘0’.
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Director
Director
User avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 703
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 33

Kudos [?]: 87 [0], given: 6

Re: GMAT Sample Questions and solution tips [#permalink] New post 06 May 2014, 05:09
Concept tested: Factoring
Question: Simplify 5^3 + 5^4 + 5^3 + 5^4
a) 625
b) 1500
c) 2500

Answer: 1500

5^3 is common in all terms. Factoring out the common term,

5^3 + 5^4 + 5^3 + 5^4
= 5^3 ( 1 + 5 + 1 + 5 )
= 5^3 ( 12 )
=125 *12
= 1500
Mantra: Look out to find the common term and factor it out to simply calculations and save time.
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Intern
Intern
avatar
Joined: 10 Sep 2013
Posts: 3
Concentration: General Management, Technology
GMAT Date: 08-20-2014
Followers: 0

Kudos [?]: 0 [0], given: 113

Re: GMAT Sample Questions and solution tips [#permalink] New post 08 May 2014, 01:19
nehasingh1020 wrote:
Concept tested: Exponents
Question: If xy < 0 , then x is
a) < 0
b) >0
c) Can’t be determined

Answer: < 0

If xy < 0 , then irrespective of the value of y , x is also negative.

Case 1 : x=2 , y =3 xy = 23 = 8 > 0
Case 2: x= -2 , y =3 xy = (-2)3 = -8 < 0

Mantra: If xy < 0 , x is also negative but it is not true vice versa. i.e if x < 0, then not necessarily xy < 0




The answer should be can't be determined as either x can be negative or y can be negative in which case x is positive. Isnt it?
Re: GMAT Sample Questions and solution tips   [#permalink] 08 May 2014, 01:19
    Similar topics Author Replies Last post
Similar
Topics:
Sampling in official GMAT CR questions, new verbal questions kirstik 0 03 Sep 2013, 11:19
30 Experts publish their posts in the topic Sampling in Official GMAT CR Questions egmat 29 29 Aug 2013, 00:28
Experts publish their posts in the topic GMAT Retake: Running out of sample questions .. gamatack 3 20 Feb 2012, 07:30
GMAT Sample Test Math Questions Part 2 dauntingmcgee 1 16 Jul 2010, 13:40
GMAT Sample Test Math Questions Part 1 dauntingmcgee 1 16 Jul 2010, 13:39
Display posts from previous: Sort by

GMAT Sample Questions and solution tips

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.