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In "Number Series" question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces

In following question, a number series is given with one term missing. Choose correct alternative

85,78,65,40,56,x

Option:
A. 51
B. 30
C. 35
D. 23
Answer: B . 30

Justification:

(1)  85 , 78 , 65.

(2)  8*5 = 40 ,7*8 = 56 ,so 6*5 = 30 

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