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Q: Look at this series: 15, __, 27, 27, 39, 39, ... What number should fill the blank?
A. 51 B. 39
C. 23 D. 15

Answer and Explanation

Answer:15

Explanation:
In this simple addition with repetition series, each number in the series repeats itself, and then increases by 12 to arrive at the next number.

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