Multiple choice

Select the correct alternative from the given ones that will complete the series. 9, 19, 37, 75, 149, ?

  1. 297

  2. 298

  3. 300

  4. 299
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This series follows a pattern of multiplying by 2 and alternately adding and subtracting 1. Specifically: 9 × 2 + 1 = 19, 19 × 2 - 1 = 37, 37 × 2 + 1 = 75, 75 × 2 - 1 = 149. Following this pattern, 149 × 2 + 1 = 299.

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