The first term of an arithmetic sequence is 1, another term of the sequence is 91 and all of the terms of the sequence are integers. What is the smallest possible common difference of the sequence?
+179 As the first term is 1, the smallest common difference between the terms is 1 because the terms are all integers.
This series would go 1, 2, 3... 89, 90, 91 ... and so on.
