If st = 3(s+ 1) + t and s and t are integers, s could be any of the following values EXCEPT:  Select.
A) 2 B) 4 C) 10 D) 3 E) 7
st = 3(s + 1) + t   st - q = 3(s + 1)   t = 3(s + 1)/(s-1)   t won't be an integer only if s = 10 (from the options).   Answer: 7
<result>E</result>
If st = 3(s+ 1) + t and s and t are integers, s could be any of the following values EXCEPT: