Answer:
The common difference is -7.
Explanation:
Given sequence,
56, 49, 42, 35, ......
Which is an Arithmetic sequence ( because consecutive terms are in same difference ),
Since, the difference between the consecutive term is called the common difference,
Thus, common difference,
d = 49 - 56 = 42 - 49 = 35 - 42 ........ = -7