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

 It is currently 28 Mar 2015, 19:09

### 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

# Q13: If n is a positive integer, what is the remainder when

Author Message
TAGS:
Manager
Joined: 11 Jan 2007
Posts: 202
Location: Bangkok
Followers: 1

Kudos [?]: 9 [0], given: 0

Q13: If n is a positive integer, what is the remainder when [#permalink]  02 Jun 2007, 20:39
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Q13:
If n is a positive integer, what is the remainder when 3^(8n+3) + 2 is divided by 5?
A.0
B.1
C.2
D.3
E.4

Q18:
What is the value of the integer k?
(1) k + 3 > 0
(2) k^4 <= 0
_________________

cool

Director
Joined: 26 Feb 2006
Posts: 906
Followers: 4

Kudos [?]: 52 [0], given: 0

Re: PS [#permalink]  02 Jun 2007, 23:25
jet1445 wrote:
Q13:If n is a positive integer, what is the remainder when 3^(8n+3) + 2 is divided by 5?
A.0
B.1
C.2
D.3
E.4

E. it should be 4 cuz 8 is multiple of 4..
Director
Joined: 26 Feb 2006
Posts: 906
Followers: 4

Kudos [?]: 52 [0], given: 0

Re: PS [#permalink]  02 Jun 2007, 23:29
jet1445 wrote:
Q18: What is the value of the integer k?
(1) k + 3 > 0
(2) k^4 <= 0

B/

from i, k could be -ve or +ve.
from ii, if k^4 is <= 0, then it is 0 cux k^4 cannot be -ve..
Manager
Joined: 14 Mar 2007
Posts: 96
Followers: 1

Kudos [?]: 9 [0], given: 0

Q13. E

Himalayan. Can you explain your logic.
Mine is a long winded way.
I found a pattern for
3^n + 2 for odd numbers (since 8n+3 is odd)
Then assumed n=1 for the eq. 3^(8n+3) + 2
This would make it 3^11 + 2
Which according to the pattern will have 4 as a remainder.
Display posts from previous: Sort by