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

 It is currently 26 Apr 2015, 13:04

### 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

# Is n an integer? n^2 is an integer sqrt(n) is an integer

Author Message
TAGS:
Director
Joined: 12 Jun 2006
Posts: 536
Followers: 1

Kudos [?]: 29 [0], given: 1

Is n an integer? n^2 is an integer sqrt(n) is an integer [#permalink]  26 Feb 2007, 00:11
Is n an integer?

n^2 is an integer
sqrt(n) is an integer
Manager
Joined: 12 Feb 2006
Posts: 115
Followers: 1

Kudos [?]: 26 [0], given: 0

I'll give it a try.

I think it is B.

For A we don't know. Try 2 and 1.41 as examples of N^2 being an integer.

For B it says the sqrt(N) is an integer. Therefore N = an integer x an integer and this always results in an integer.
SVP
Joined: 01 May 2006
Posts: 1805
Followers: 8

Kudos [?]: 98 [0], given: 0

Agree with bz9
Director
Joined: 12 Jun 2006
Posts: 536
Followers: 1

Kudos [?]: 29 [0], given: 1

1.414214 works. Are there any other numbers that work too? Is there a way (ie equation) to prove this?
Senior Manager
Joined: 18 Feb 2007
Posts: 253
Followers: 1

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

ggarr wrote:
1.414214 works. Are there any other numbers that work too? Is there a way (ie equation) to prove this?

sqrt(5),sqrt(6),sqrt(7), or any other integer hat does not have a square root..
Director
Joined: 12 Jun 2006
Posts: 536
Followers: 1

Kudos [?]: 29 [0], given: 1

Quote:
any other integer hat does not have a square root
thanks. I should've seen that.
Similar topics Replies Last post
Similar
Topics:
2 Is n^2 an even integer? 2 01 Nov 2013, 23:56
1 The positive integer n is divisible by 16. If sqrt(n) is 2 06 Mar 2013, 11:28
Is 'n' an integer? (1) n^2 is an integer. (2) sqrt(n) is an 3 24 Jul 2007, 13:56
Is n an integer? 1) n^2 is an integer 2)SQRT(n) is an 8 31 May 2006, 18:32
Is n an integer? 1) n^2 is an integer 2) sqrt(n) is an 5 18 Nov 2005, 18:00
Display posts from previous: Sort by