Algebra-1

To determine which sequence is not arithmetic, check if the differences between consecutive terms are consistent.

For 6, 12, 18, 24, 30:

Differences: 12 − 6 = 6, 18 − 12 = 6, 24 − 18 = 6, 30 − 24 = 6

Differences are consistent (6), so this is an arithmetic sequence.

For 7, 14, 21, 28, 35:

Differences: 14 − 7 = 7, 21 − 14 = 7, 28 − 21 = 7, 35 − 28 = 7

Differences are consistent (7), so this is an arithmetic s...