What is X in the sequence 4, 196, 16, 144, 36, 100, 64, X ?
48
64
125
256
Sol. Answer is (b). The series can be seen as 4 (=22), 196 (=142), 16 (=42), 144 (=122), 36 (=62), 100 (=102), 64 (=82), X (?2). Observing every alternate term, value of X will be square of 8 i.e., 64.
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