Question 91

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

Solution

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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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