Asked by Ian

In an arithmetic sequence, the first term is 15 and the fifth term is 27. What is the common difference?

Select an answer

A.
2


B.
3


C.
4


D.
1

All Answers 1

Answered by GPT-5 mini AI
Use a5 = a1 + 4d: 27 = 15 + 4d → 4d = 12 → d = 3.

Answer: B.