Is the Sequence Arithmetic? No. Explanation: See solution.
Practice makes perfect
When a sequence is arithmetic, the difference between two consecutive terms is constant. Let's see if this is the case for the given sequence.
1 + 7 ⟶ 8 + 19 ⟶ 27 + 37 ⟶ 64 ⟶ ...
As we can see, the difference between consecutive terms is not constant. Therefore, the sequence is not arithmetic.