F2, __, D8, C16, B32 What number should fill the blank?

A16
G4
E4
E3

The answer is E4.

The sequence is a geometric sequence with a common ratio of 2. This means that each term is 2 times the term before it.

F2, (2)(F2), (2)(2)(F2), (2)(2)(2)(F2), …

F2, 2F2, 4F2, 8F2, …

F2, 4, 8, 16, …

The missing term is therefore E4.

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