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Select the alphanumeric clusters from among the given options that can replace the question mark (?) in the following series.z1, x4, v9, t16, ?
Question

Select the alphanumeric clusters from among the given options that can replace the question mark (?) in the following series.
z1, x4, v9, t16, ?

A.

t26

B.

v25

C.

s24

D.

r25

Correct option is D

Given: z1, x4, v9, t16, ?
Logic: Letters are decreasing - 2 place and numbers are perfect square of natural numbers.
​z - 2 = x, 1 = 12
x - 2 = v, 4 = 22
v - 2 = t, 9 = 32
t - 2 = r, 16 = 42​
Next perfect square is: 52= 25
Next term is r25.
Thus, correct option is (d).

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