Answer: 10th.
- A 8th
- B 9th
- C 10th
- D 11th
Correct answer: C. 10th
Explanation: 61 = 7 + (n-1)6, 54 = (n-1)6, n-1 = 9, n = 10. So 61 is the 10th term.
Bar heights for AP 2, 5, 8, 11 with the common difference d=3 marked between consecutive terms.
Concept context
Arithmetic progressions, geometric progressions, and sums