I think its 12. 
I could be wrong. Let me know. 
-Steel jelly
 
        
                    
             
        
        
        
5.67 (performed on a calculator)
        
                    
             
        
        
        
Answer:
No solutions
Step-by-step explanation:
 
        
             
        
        
        
Answer:
i am pretty sure the answer is UT. 
Step-by-step explanation:
this is because all the letters have linear connections to the other letter, all except UT do.
i hope this helps, tell me if this is wrong.