Question 91

Complete the series.
4, 196, 16, 144, 36, 100, 64, (…)

Solution

4, 196, 16, 144, 36, 100, 64, (…)

it contains two series

4,  16,  36,  64     (1)

196,144,100,(...)  (2)

first one is square of even nos

$$2^2,4^2,6^2,8^2$$

second one is decreasing order ofeven nos squares

$$14^2,12^2,10^2,8^2$$

so ans is $$8^2= 64$$


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