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

 It is currently 05 Jul 2015, 18:57

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# What is the reminder of 7^ (4n+3)* 6^n divided by 10? b. 4

Author Message
TAGS:
Manager
Joined: 27 Jul 2003
Posts: 124
Location: Singapore
Followers: 1

Kudos [?]: 10 [0], given: 0

What is the reminder of 7^ (4n+3)* 6^n divided by 10? b. 4 [#permalink]  05 Oct 2003, 21:36
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the reminder of 7^ (4n+3)* 6^n divided by 10?
b. 4
d. 8
CEO
Joined: 15 Aug 2003
Posts: 3467
Followers: 61

Kudos [?]: 718 [0], given: 781

Re: DS#3 [#permalink]  06 Oct 2003, 02:14
araspai wrote:
What is the reminder of 7^ (4n+3)* 6^n divided by 10?
b. 4
d. 8

Did you mean PS ?

units digit of 7 ^ (4n+3) is always 3
units digit of 6 is always 6

3*6 = 18
units digit of product is 8..remainder 8

example..

n = 1 ... 7^7 * 6 .. the units digit is 8 ..remainder 8

n = 2 ... 7^11 * 6* 6 units digit is 8 .remainder 8

thanks
praetorian
SVP
Joined: 30 Oct 2003
Posts: 1794
Location: NewJersey USA
Followers: 5

Kudos [?]: 43 [0], given: 0

if N = 0 then 7^3 = 343 the remainder is 3. Range of N is not stated.
Director
Joined: 13 Nov 2003
Posts: 971
Location: Florida
Followers: 1

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

anandnk wrote:
if N = 0 then 7^3 = 343 the remainder is 3. Range of N is not stated.

agree, but when the answer choices are provided, then it is 8
Similar topics Replies Last post
Similar
Topics:
3 give n is a positive integer, what is the reminder when 3^n is divided 3 01 Feb 2015, 14:42
What is the reminder when the positive integer x is divided 1 25 Apr 2011, 08:22
1 What is the value of b ? (1) b4 = 16 (2) 7^(3b 4) = 49 I 3 20 Feb 2011, 07:13
5 What is the remainder when a is divided by 4? 7 19 Dec 2010, 14:22
What is the reminder when the positive integer n is divided 12 13 Oct 2008, 09:06
Display posts from previous: Sort by