EduGoog
In following questions, one term in number series is incorrect.

Find out the incorrect number 5, 10, 40, 80, 320, 550, 2560

Option:
A. 80
B. 320
C. 550
D. 2560
Answer: C . 550

Justification:

The  sequence is * 2, * 4, * 2, * 4,....
So, 550 is wrong and must be replaced by (320 * 2)  i.e. 640.

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