Look at this series: 0.7, 2.1, ____, 18.9, 56.7, ... What number should fill the blank?\nOptions:\n(A) 6.3\n(B) 5.3\n(C) 6.2\n(D) 6.1\n(E) 4.3 Think first, then make a decision. Some random thoughts:
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This is a simple multiplication series. Each number is 3 times greater than the previous number. So the answer is (A).
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