Multiple choice

Directions: Find the missing term in the following series. 18, 18, 36, 21, 72, 24, 144, ?, 288

  1. 40

  2. 33

  3. 27

  4. 25

  5. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series consists of two interleaved patterns. The first pattern is 18, 36, 72, 144, 288 (multiplying by 2). The second pattern is 18, 21, 24, ? (adding 3). Following the second pattern, 24 + 3 = 27.

AI explanation

The series is formed by interleaving two different patterns. The first pattern at the odd positions is 18, 36, 72, 144, 288, where each term is multiplied by 2. The second pattern at the even positions is 18, 21, 24, where 3 is added to each preceding term. Following this addition rule, 24 plus 3 equals 27. The result is 27.

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