In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces.
4, 32, 128,
A
128
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B
144
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C
192
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D
256
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Solution
The correct option is D 256 The pattern is + 20.5, + 22.5,.... ∴ Missing number = 128 * 2 = 256.