Question
Look at this series: 4, 7, 25, 10, __, 20, 16, 19, ... What number should fill the blank?
Answer: Option A
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Two series alternate here, with every third number following a different pattern. In the main series, 3 is added to each number to arrive at the next. In the alternating series, 5 is subtracted from each number to arrive at the next.
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