i hope my answer helps you and you will give me the best answer 
 
        
             
        
        
        
You can obtain the a number for which they all divisors by calculating the least common multiple.
This way:
85 = 5*17*1
17=17*1
19=19*1
4=2^2 *1
2=2*1
The least common multiple is: 5*17*19*2^2 = 6,460.
Then 84, 17, 19, 4 and 2 are all divisors of 6,460. 
        
             
        
        
        
When you say "Which number ...", I expect to see a list of choices at the 
end of the question, and I get very upset when there's nothing there.
                                            9h + 15 > 55
Subtract  15  from each side:          9h > 40
Divide each side by  9 :                  <em>  h > 40/9</em>
Any number greater than (4 and 4/9) satisfies the inequality.
        
                    
             
        
        
        
Do you know it in English because then i can help<span />