Question

Numerical series
7,4.5, 5.5, 12, ? ,393.
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Answer 1

Answer:

To understand better to that serises.

7 * 0.5 + 1 = 4.5,

4.5 * 1 + 1 = 5.5,

5.5 * 2 + 1 = 12,

12 * 4 + 1 = 49,

49 * 8 + 1 = 393.