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

It is currently 21 Aug 2014, 16:31

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

reminder

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 08 Nov 2008
Posts: 308
Followers: 2

Kudos [?]: 35 [0], given: 7

GMAT Tests User
reminder [#permalink] New post 27 Jan 2011, 21:36
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the reminder if 7^25 is divided by 4 ??
Pls share the method to solve this kind of problem ..
_________________

"CEO in making"

Intern
Intern
User avatar
Joined: 13 Oct 2010
Posts: 21
Location: Milpitas, CA
Followers: 2

Kudos [?]: 1 [0], given: 0

Re: reminder [#permalink] New post 28 Jan 2011, 02:42
tenaman10 wrote:
What is the reminder if 7^25 is divided by 4 ??
Pls share the method to solve this kind of problem ..


Please see this thread : http://gmatclub.com/forum/reminder-108378.html#p859740

Same methods are applicable here too.
_________________

Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)
+91-99201 32411 (India)
http://www.facebook.com/Gurome

Senior Manager
Senior Manager
User avatar
Joined: 08 Nov 2010
Posts: 422
WE 1: Business Development
Followers: 7

Kudos [?]: 33 [0], given: 161

GMAT ToolKit User GMAT Tests User
Re: reminder [#permalink] New post 29 Jan 2011, 11:24
Hmm - i didnt read the thread posted above, but i did it in one way - i hope its not a mistake.

i did 7/4 = 1 with a reminder of 3.

now - if i have a reminder of 3 for every 7 it means i have a reminder of

3*25 (bc i have 25's 7's)...

if i divide again all the reminders - 3*25=75 and ill divide it again in 4

75/4 = 18 with a reminder of 3.

so the reminder of (7^25)/4 should be 3.

i hope i had it correct.
_________________

Get the best GMAT Prep Resources with GMAT Club Premium Membership

1 KUDOS received
Intern
Intern
avatar
Joined: 27 Jan 2011
Posts: 21
Followers: 0

Kudos [?]: 2 [1] , given: 27

Re: reminder [#permalink] New post 29 Jan 2011, 12:05
1
This post received
KUDOS
In the following explanation symbol a^b shoul be understood as A raised to the power and A/B is A divided by B.

1) I will try to explain a simple logic. Lets say if you were asked what is the remainder when 3/2, answer would be 1. Now lets say 3^2/2, in that case answer is 1*1, which is 1 again. Now let say if you were asked what was the remainder for 3^100/2, it would be 1*1*1*1.......100 times which is 1 again.
Till now what you have seen is the concept of positive remainder that is the divisor is less than the dividend

2) In the same way there is this concept called negative remainder, this would be applicable in the situation where divsor is less than the dividend. This brings me to the situation posed in the question asked. Let me give an example: what is the remainder when 2/3 it is 2 or (3-1)/3 or (3/3) - (1/3) or 0-1 or -1. So when 2 is divided by 3 i can say the remainder is 2 or -1. In the same way what would be the remainder when 2^2 / 3. It would be -1*-1, which gives me 1. In the same way lets say 2^2000/3 would be -1 multiplied 2000 times which gives me 1. This i can generalise as 2^even number when divided by 3 gives me -1 multipled even number of times resulting in 1. Had it been 2^odd number it gives me -1 multiplied odd number of times, that is negative remainder -1 or it could be translated to positive remainder 3-1 that is 2

If you understood what is being told try to solve these question
1) 4^123/3
2) 7^12345/8
the above questions are direct applications of positive remainder and negative remainder respectively

Last edited by pkonduri on 30 Jan 2011, 02:52, edited 1 time in total.
Senior Manager
Senior Manager
User avatar
Joined: 08 Nov 2010
Posts: 422
WE 1: Business Development
Followers: 7

Kudos [?]: 33 [0], given: 161

GMAT ToolKit User GMAT Tests User
Re: reminder [#permalink] New post 29 Jan 2011, 12:14
so u agree with the way i did it?

abt ur questions:

1. reminder of 1.
2. reminder of 7.

am i right?

Thanks. +1
_________________

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 27 Jan 2011
Posts: 21
Followers: 0

Kudos [?]: 2 [0], given: 27

KRe: reminde [#permalink] New post 29 Jan 2011, 12:43
144144 wrote:
so u agree with the way i did it?

abt ur questions:

1. reminder of 1.
2. reminder of 7.

am i right?

Thanks. +1


you got the answer right, but i saw the solution you gave to thevquestion posed. the question does nit translate to 3*25 it should 3 raised to the power 25.. And not 75. Change the question to 7^24/4 and find the answer to understand the mistake you made in the solution you posted

Posted from my mobile device Image
Senior Manager
Senior Manager
User avatar
Joined: 08 Nov 2010
Posts: 422
WE 1: Business Development
Followers: 7

Kudos [?]: 33 [0], given: 161

GMAT ToolKit User GMAT Tests User
Re: reminder [#permalink] New post 29 Jan 2011, 21:25
thanks both. i understand my mistake.

have a great weekend.
_________________

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Re: reminder   [#permalink] 29 Jan 2011, 21:25
    Similar topics Author Replies Last post
Similar
Topics:
reminder !! - 1 tenaman10 3 27 Jan 2011, 21:47
Experts publish their posts in the topic quotient and reminder vanidhar 4 25 Oct 2010, 06:37
A question of Reminder Capthan 1 11 Sep 2010, 00:53
2 PS -Reminder vivektripathi 14 02 Dec 2008, 06:31
PS: reminder Himalayan 2 28 Jul 2007, 15:31
Display posts from previous: Sort by

reminder

  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®.