What will come in place of the x in the following Number series? 25, 100, 400, X, 6400	Pick one
A) 6400 B) 6900 C) 1600 D) 7500 E) 7900
(1600)   25 x 4 = 100, 100 x 4 = 400, 400 x 4 = 1600, 1600 x 4 = 6400.
<result>C</result>
What will come in place of the x in the following Number series? 25, 100, 400, X, 6400