Which arithmetic sequence has a common difference of 4?
(1) 4, 16, 64, 256
(2) 8, 4, 0, -4
(3) 6, 10, 14, 18
(4) 4, 8, 14, 18
Sequence three has a common difference of 4, as it is an arithmetic sequence and 4 is the constant amount of change between the numbers in the sequence.
+73 
