Question
In each of the following series, one term is missing.
Find the missing term. 2, 5, 11, 23, 47, ?Solution
2 → 5: 2 × 2 + 1 = 5 5 → 11: 5 × 2 + 1 = 11 11 → 23: 11 × 2 + 1 = 23 23 → 47: 23 × 2 + 1 = 47 Pattern: term ₙ = term ₙ₋₁ × 2 + 1 Missing term = 47 × 2 + 1 = 94 + 1 = 95
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