question_answer

80, 63, 72, 72, 64, 81, 56, ?

A) 96                   

B)          98

C) 89                   

D)          90

Correct Answer: D

Solution :

    There are two alternate series: Series 1:80, 72, 64, 56 (following - 8 pattern) Series 1:63, 72, 81, 90 (following + 9 pattern)