Multiple choice

Directions: Find the missing term in the following series. 4, 9, 20, 43, 90, ?

  1. 180

  2. 182

  3. 179

  4. 185
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D Correct answer
AI explanation

The series follows the pattern of multiplying the previous term by 2 and then adding 1. Applying this method, we calculate 4 times 2 plus 1 is 9, 9 times 2 plus 2 is 20, 20 times 2 plus 3 is 43, and 43 times 2 plus 4 is 90. Continuing this pattern, the next term is 90 times 2 plus 5, which equals 185.

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