Q: In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much?\nLook at this series: 1, 5, 7, 3, __, 1 ...Which number is missing?\nOptions:\n(A) 2\n(B) 4\n(C) 12\n(D) 0\n(E) 13 Let's give some random thoughts before answering.
User
E\n13\nThis is an alternating addition and subtraction series. In the first pattern, 6 is added to each number to arrive at the next. In the second, 2 is subtracted from each number to arrive at the next.
Therefore, the answer is (E).
Assistant