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4, -8, 16, -32, 64, (….)

/ Aptitude, Odd Man Out And Series / By
Question:
4, -8, 16, -32, 64, (….)

[A].

128

[B].

-128

[C].

192

[D].

-192

Answer: Option B

Explanation:

Each number is the proceeding number multiplied by -2.

So, the required number is -128.