CAT 2017 Slot 2 QA Q18 Geometry

Question 18 of the Quantitative Ability (QA) section, CAT 2017 Slot 2, with CAT's official answer.

ABCD is a quadrilateral inscribed in a circle with centre O. If ∠COD = 120 degrees and ∠BAC = 30 degrees, then the value of ∠BCD (in degrees) is [TITA]

TITA: type in the answer. There are no options and no negative marking.

Answer: 90 Geometry TITA

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