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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Arshad khan
19. first all the single small squares (7). then pairs of 2 horizontally (4) . then pairs of two vertically (4) ...then.... quad with three squares, one vertical and one horizontal (2).. then bigger squares of 4 small squares.. (2) Therefore 7+4+4+2+2=19.. mark me best ans