need help

Hi, there:
I think i need to re-phrase my question since last time I did not get
any reply but i think the question is not that hard, probably i did
not make the question clear:

I want to find cases like
35, 90, 330, 330, 335

from the rest which look like
3, 3, 3, 3.2, 3.3
4, 4.4, 4.5, 4.6, 4.7
....

basically there is one (or more) big 'gap' in the case i seek. 

thanks,

weiwei

Weiwei Shi, Ph.D

"Did you always know?"
"No, I did not. But I believed..."
---Matrix III