Number series with a periodic constant term – find the next two numbers. Sequence: 3, 5, 35, 10, 12, 35, 17, ____ , ____

Difficulty: Easy

Correct Answer: 19 35

Explanation:

Introduction / Context:This series alternates two behaviors: an increasing subsequence and a fixed repeating value that appears at regular positions. Recognizing the period of the fixed term is key.

Given Data / Assumptions:

  • Given: 3, 5, 35, 10, 12, 35, 17, …
  • Find the next two terms.

Concept / Approach:Note that every third term is 35, while the other terms form their own +2 progression across non-multiple-of-3 indices.

Step-by-Step Solution:

Positions and values: 1:3, 2:5, 3:35, 4:10, 5:12, 6:35, 7:17, 8:?, 9:?Every 3rd term is 35 (positions 3, 6, 9, …).The non-3rd positions increase by +2: 3→5→10→12→17→19 → …Thus, 8th term (not multiple of 3) = 17 + 2 = 19.9th term (multiple of 3) = 35.

Verification / Alternative check:Check back: positions 1,2,4,5,7 follow +2 steps, and 3,6,9 are constant at 35. The pattern is fully consistent.

Why Other Options Are Wrong:

  • 22 35 / 19 24: Misapply +3 or create a non-existent jump.
  • 35 19: Reverses the order; 35 must be the 9th term, not 8th.
  • 22 24: Ignores the required 35 at position 9.

Common Pitfalls:Forgetting to check positional periodicity; not all patterns are simple differences—some embed a repeating constant at fixed intervals.

Final Answer:19 35

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