CAT Quantitative Ability Questions | CAT Geometry questions
CAT/2003
Question . 77
Each side of a given polygon is parallel to either the X or the Y axis. A corner of such a polygon is said to be convex if the internal angle is 90° or concave if the internal angle is 270°. If the number of convex corners in such a polygon is 25, the number of concave corners must be
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Method of solving this CAT Quantitative Ability Question from Geometry question
(c) The number of convex corners is always less than concave corners by 4. Hence 25 – 4 = 21.