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# exponents

Author Message
Manager
Joined: 20 May 2008
Posts: 55

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03 Feb 2009, 00:17
If n is a positive integer, what is the remainder when 38^n+3 + 2 is divided by 5?

A. 0
B. 1
C. 2
D. 3
E. 4

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CEO
Joined: 17 Nov 2007
Posts: 3486
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40

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03 Feb 2009, 02:18
Maybe It is 38^4n+3
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Manager
Joined: 20 May 2008
Posts: 55

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03 Feb 2009, 04:37
nope its not that..
the sums from set 1 - old gmat papers
SVP
Joined: 07 Nov 2007
Posts: 1738
Location: New York

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03 Feb 2009, 05:21
LoyalWater wrote:
If n is a positive integer, what is the remainder when 38^n+3 + 2 is divided by 5?

A. 0
B. 1
C. 2
D. 3
E. 4

n=1
38^4 + 2 .. unit digit 6 +2 --> unit digit 8 --> remainder could be 3
n=2
38^4 + 2 .. unit digit 8 +2 --> unit digit 0 --> remainder could be 0

there is some problem with question

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Re: exponents   [#permalink] 03 Feb 2009, 05:21
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# exponents

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