Difficulty: Medium
Correct Answer: 9 10
Explanation:
Introduction / Context:This sequence combines a short run of consecutive integers with a compress–expand adjustment, and then resumes incremental growth. We must identify the cycle and continue it.
Given Data / Assumptions:
Concept / Approach:
Interpret the pattern as: increase by 1 for a short run, then apply a “compress then expand” operation (drop, then double), then resume the +1 run from the new higher base.
Step-by-Step Solution:
Consecutive run: 2, 3, 4, 5, 6 (+1 each step).Compress: 6 → 4 (a drop).Expand: 4 → 8 (doubling jump).Resume +1 progression from 8: next = 9, then 10.Verification / Alternative check:
Resuming +1 after the expand step is consistent with the sequence’s earlier incremental pattern and yields a smooth continuation.
Why Other Options Are Wrong:
4 8 repeats the compress–expand, not a continuation; 10 4 or 9 4 break the resumed +1 growth; 8 9 starts with a duplicate of the last term.
Common Pitfalls:
Overfitting a single arithmetic rule to all steps; this series deliberately inserts a transform before resuming simple increments.
Final Answer:
9 10
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