1. In the following question, Select the number which can be placed at the sign of question mark (?) from the given alternatives.
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By: anil on 05 May 2019 02.20 am
The pattern followed is that the middle number is the square of sum of the digits at the vertices. Eg :- $$(2+3+4)^2=(9)^2=81$$ and $$(7+2+1)^2=(10)^2=100$$ Similarly, $$(9+2+1)^2=(12)^2=144$$ => Ans - (D)
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