Tell whether the sequence is arithmetic. If it is, what is the common difference?

Question

9, 14, 20, 27,,....

Answer 1

The given sequence is not arithmetic because there is no common difference between consecutive terms. The differences between consecutive terms are:

14 - 9 = 5
20 - 14 = 6
27 - 20 = 7

As the differences are not constant, the sequence is not arithmetic.