Logical Reasoning :: Number Series - Discussion

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Explanation:
Break the series as below
3,5,2,100 | 4,7,3,196 | 1,6,5,?
(3 + 5 + 2)^2 = 10^2 100
(4 + 7 + 3)^2 = 14^2 = 196
=>(1 + 6 + 5)^2 = 12^2 = 144