Multiple choice

Directions: In the given question, there is a series with one term missing (?). This term is given as one of the alternatives given below the question. Find the correct term. 89, 71, 55, ?, 29, 19

  1. 38

  2. 39

  3. 42

  4. 41
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D Correct answer
Explanation

The pattern is: 89 - 18 = 71; 71 - 16 = 55; 55 - 14 = 41; 41 - 12 = 29; 29 - 10 = 19. The difference decreases by 2 each time.

AI explanation

The series decreases by subtracting consecutive composite numbers. The subtractions are 18, 16, 14, 12 and 10, giving 89, 71, 55, 41, 29 and 19. The missing term is therefore 41.

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