Is n an integer?
1) n square is an integer
2) square root n is an integer
[spoiler]ANS: B[/spoiler]
Please explain me understand the problem
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
Square and Root
This topic has expert replies
-
jerryragland
- Senior | Next Rank: 100 Posts
- Posts: 58
- Joined: Tue Nov 24, 2009 2:23 pm
- Thanked: 1 times
-
Frankenstein
- Legendary Member
- Posts: 1448
- Joined: Tue May 17, 2011 9:55 am
- Location: India
- Thanked: 375 times
- Followed by:53 members
Hi,
From(1): if n^2 = 4, n is integer
if n^2 = 5, n is not an integer
Insufficient
From(2): sqrt(n) is integer. So n is square of an integer which is always integer
Sufficient
Hence, B
From(1): if n^2 = 4, n is integer
if n^2 = 5, n is not an integer
Insufficient
From(2): sqrt(n) is integer. So n is square of an integer which is always integer
Sufficient
Hence, B
Cheers!
Things are not what they appear to be... nor are they otherwise
Things are not what they appear to be... nor are they otherwise
-
cans
- Legendary Member
- Posts: 1309
- Joined: Mon Apr 04, 2011 5:34 am
- Location: India
- Thanked: 310 times
- Followed by:123 members
- GMAT Score:750
a) n^2 is integer.
n=4,root(2) insufficient
b)root(n) is integer
n is integer
Sufficient
IMO B
n=4,root(2) insufficient
b)root(n) is integer
n is integer
Sufficient
IMO B
If my post helped you- let me know by pushing the thanks button 
Contact me about long distance tutoring!
[email protected]
Cans!!
Contact me about long distance tutoring!
[email protected]
Cans!!
