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Look at this series: 4, 7, 25, 10, __, 20, 16, 19, ... What number should fill the blank? |
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Answer: Option A Explanation: 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. |
Find the number that fits somewhere into the middle of the series. Some of the items involve both numbers and letters
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