I don't like to explain right away.
It is tricky doesn't it?
This question is taken from a real GMAT by the way...
The answer, as my two "reserved" fellow gmat takers pointed out above, is E.
The key to this question comes from answering the following question:
Is there a real number greater than 9, less than 11 and other than 10 that
squared would give a positive integer?
Yes, there are many numbers: 98^(1/2), 99^(1/2), 101^(1/2) ...