Respuesta :

We have the following arithmetic series:
 4, 13, 22, 31, 40
 The common difference is given by:
 13-4 = 9
 22-13 = 9
 31-22 = 9
 40-31 = 9
 Since it is an arithmetic series, the difference is constant.
 Answer:
 
The common difference is:
 
9
 
option 4