1.

In the following question, select the missing number from the given series._x005F_x000D_  _x005F_x000D_ 42, 21, 21, ?, 63, 157.5_x005F_x000D_

A. 30.75
B. 32.5
C. 31.5
D. 33.75
Answer» D. 33.75


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