GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 20 Aug 2018, 14:05

### 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

# Collection of some questions on Number System

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Manager
Joined: 29 Apr 2013
Posts: 97
Location: India
Concentration: General Management, Strategy
GMAT Date: 11-06-2013
WE: Programming (Telecommunications)
Collection of some questions on Number System  [#permalink]

### Show Tags

25 Sep 2013, 08:04
58
10
I have practiced number system questions from various sources and documented most of them at one place.
Attached are the questions for you.

Happy solving
Attachments

Number System - Solution.pdf [20.12 KiB]
Downloaded 2812 times

 To download please login or register as a user

Number System Practice Questions.pdf [92.09 KiB]
Downloaded 3339 times

 To download please login or register as a user

_________________

Do not forget to hit the Kudos button on your left if you find my post helpful

Collection of some good questions on Number System

Manager
Joined: 01 Oct 2010
Posts: 78
Location: United States (NC)
GPA: 2.3
WE: Information Technology (Computer Software)
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

26 Sep 2013, 10:06
5
1
Thanks for the compilation!
_________________

---------------------------------------------------------------
Consider to give me kudos if my post helped you.

Manager
Joined: 29 Apr 2013
Posts: 97
Location: India
Concentration: General Management, Strategy
GMAT Date: 11-06-2013
WE: Programming (Telecommunications)
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

28 Sep 2013, 09:43
7
23 downloads and just 2 kudos
_________________

Do not forget to hit the Kudos button on your left if you find my post helpful

Collection of some good questions on Number System

Intern
Joined: 08 Jun 2014
Posts: 3
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

03 Sep 2014, 09:11
1
Are there any solutions available for the above questions?
Senior RC Moderator
Status: It always seems impossible until it's done!!
Joined: 29 Aug 2012
Posts: 1185
Location: India
WE: General Management (Aerospace and Defense)
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

03 Sep 2014, 09:13
1
vikram230790 wrote:
Are there any solutions available for the above questions?

There are 2 files- 1st file with problems & 2nd with the solutions.

Hope it helps
_________________
Math Expert
Joined: 02 Sep 2009
Posts: 48067
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

03 Sep 2014, 09:14
1
1
vikram230790 wrote:
Are there any solutions available for the above questions?

Download Number System - Solution.pdf (the firs file).
_________________
Intern
Joined: 08 Jun 2014
Posts: 3
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

03 Sep 2014, 09:14
I was looking for a detailed solution for all the problems.
Math Expert
Joined: 02 Sep 2009
Posts: 48067
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

03 Sep 2014, 09:15
vikram230790 wrote:
I was looking for a detailed solution for all the problems.

Most of them are discussed on the forum. Please use SEARCH.
_________________
Intern
Joined: 02 Oct 2017
Posts: 1
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

02 Oct 2017, 22:02
Can someone please solve this question...

Q8. How many distinct prime factors does 540 + 537 have?
A) 1
B) 2
C) 3
D) 4
E) 5
Math Expert
Joined: 02 Sep 2009
Posts: 48067
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

02 Oct 2017, 23:02
swatilimaye wrote:
Can someone please solve this question...

Q8. How many distinct prime factors does 540 + 537 have?
A) 1
B) 2
C) 3
D) 4
E) 5

Please follow the rules when posting a question: https://gmatclub.com/forum/rules-for-po ... 33935.html

Next, it should be:
How many distinct prime factors does 5^40 + 5^37 have?

$$5^{40} + 5^{37} =5^{37}(5^3+1)=5^{37}*126 =2*3^2*5^{37}*7$$.

Thus, 5^40 + 5^37 has 4 primes: 2, 3, 5, and 7.

Answer: D.

Similar question: https://gmatclub.com/forum/how-many-pos ... 89492.html

Hope it helps.
_________________
Intern
Joined: 10 Sep 2017
Posts: 1
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

10 Oct 2017, 02:38
I am getting answer as 3 prime factors when solved as below:

540+537=1077 =>1*3*359.

Here 359 is prime number, so making a total of 3 prime factors for 540+537.

Let me know if there is any error in above solution.

Sent from my iPhone using GMAT Club Forum mobile app
Math Expert
Joined: 02 Sep 2009
Posts: 48067
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

10 Oct 2017, 03:28
1
Anu1805 wrote:
I am getting answer as 3 prime factors when solved as below:

540+537=1077 =>1*3*359.

Here 359 is prime number, so making a total of 3 prime factors for 540+537.

Let me know if there is any error in above solution.

Sent from my iPhone using GMAT Club Forum mobile app

It's 5^40 + 5^37 NOT 540 + 537
_________________
Manager
Joined: 10 Sep 2015
Posts: 66
Location: India
Concentration: Finance, Human Resources
GMAT 1: 640 Q47 V31
GPA: 4
Re: Collection of some questions on Number System  [#permalink]

### Show Tags

10 Oct 2017, 14:38
Anu1805 wrote:
I am getting answer as 3 prime factors when solved as below:

540+537=1077 =>1*3*359.

Here 359 is prime number, so making a total of 3 prime factors for 540+537.

Let me know if there is any error in above solution.

Sent from my iPhone using GMAT Club Forum mobile app

if you take 540+537 then also it will be 2 not 3 as '1' is not a prime number and can not be a prime factor
Re: Collection of some questions on Number System &nbs [#permalink] 10 Oct 2017, 14:38
Display posts from previous: Sort by

# Collection of some questions on Number System

 post reply Question banks Downloads My Bookmarks Reviews Important topics

# Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.