Is the following sequence arithmetic? If so, identify the common difference.

18, 13, 8, 3,

Yes; 10

No

Yes; 5

Yes; - 5

D (Yes; -5) is correct.

Step-by-step explanation:

Let's check 2 consecutive numbers

A (1) = 18

A (2) = 13

=> common difference=A (2) - A (1) = 13-18 = -5

(Also, we see A (4) - A (3) = A (3) - A (2) = -5)