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Example 5: Alternating interleaved number series

Last Updated On: Sat Aug 29 2026

Given Series

  1. Given number series: 14, 28, 20, 40, 32, 64, ?

Question

Determine the next term in the series.

Answer

56.

Solution

  1. Analyze the operations connecting alternate terms or consecutive pairs:
  2. 14 × 2 = 28
  3. 28 - 8 = 20
  4. 20 × 2 = 40
  5. 40 - 8 = 32
  6. 32 × 2 = 64
  7. Pattern rule alternates between multiplying by 2 (× 2) and subtracting 8 (- 8).
  8. Next operation is -8.
  9. Next term = 64 - 8 = 56.
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