Difficulty: Easy
Correct Answer: 25 32
Explanation:
Introduction / Context:This pattern interleaves a constant term with a steadily decreasing subsequence. Recognizing position-based rules (odd/even positions) is crucial in such series.
Given Data / Assumptions:
Concept / Approach:Split into two subsequences: odd-index terms and even-index terms. Continue each separately and then interleave.
Step-by-Step Solution:
Odd positions (1,3,5,7,…): 32, 32, 32, 32, … (constant).Even positions (2,4,6,…): 31, 29, 27, … which decreases by 2 each step.After the 7th term (32), the 8th term (even position) is 27 − 2 = 25, and the 9th term (odd) returns to 32.Verification / Alternative check:Interleaving gives: 32, 31, 32, 29, 32, 27, 32, 25, 32 — consistent with the rules.
Why Other Options Are Wrong:
Common Pitfalls:Forgetting to treat odd and even indexed terms differently.
Final Answer:25 32
Discussion & Comments