1. A rectangular floor is fully covered with square tiles of identical size. The tiles on the edges are white and the tiles in the interior are red. The number of white tiles is the same as the number of red tiles. A possible value of the number of tiles along one edge of the floor is





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  • By: anil on 05 May 2019 02.29 am
    Let C and R be no. of columns and rows respectively.
    So according to given condition we have (C-2)*2 + 2*R = (C-2)(R-2).
    Now start putting value of c from options into this equation. Only for one option B we get an integer value of R .
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