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## OG 11 DS problem

This topic has 2 member replies
pavithra Junior | Next Rank: 30 Posts
Joined
18 Jan 2007
Posted:
24 messages

#### OG 11 DS problem

Wed Mar 14, 2007 1:21 pm
This problem is in the DS section (QN. no.146) of OG11.

Is n an integer?

1) n^2 is an integer
2) sq. rt of n is an integer

If n^2 is an integer, n should also be an integer , right??? Shouldn't the answer be D.

Thanks
Pavithra

pavithra Junior | Next Rank: 30 Posts
Joined
18 Jan 2007
Posted:
24 messages
Wed Mar 14, 2007 7:13 pm
Right I get it now...Thanks

rajesh_ctm Master | Next Rank: 500 Posts
Joined
27 Feb 2007
Posted:
135 messages
2
Wed Mar 14, 2007 5:40 pm
If n^2 is an integer, n should also be an integer , right???

Not necessary. Fitting in numbers is the easiest method to verify. Root of 2 is not an integer. But its square, i.e. 2 is an integer.

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