Directions: In this question, a number series is given with one term missing. Choose the correct alternative that will replace the question mark and complete the series. 45, 54, 47, ?, 49, 56, 51, 57, 53

This is an alternating series where the first sequence of numbers increases by 2 and the second sequence increases by 3. The first sequence starts with 45, 47, 49, 51, 53, while the second sequence starts with 54 and becomes 54 plus 3, which is 57. The missing term belongs to the second sequence immediately after 54, making it 55.

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