Which one of the following boxes contains the golf ball ?
- (a) F
- (b) E ✓ UPSC's answer
- (c) D
- (d) None of the above
Why the answer is (b)
• Balls known directly: A has tennis, C has cricket, B has volleyball; so hockey, golf and football are in D, E and F.
• Hockey is in neither D nor E, so hockey is in F.
• Golf is not in D, so golf is in E, leaving football in D.
• Colours: A orange, C green; golf is in the violet box, so E is violet.
• Hockey's box (F) is neither blue nor yellow, so F is indigo; B and D share blue and yellow, and nothing decides which is which.
• Hence the golf ball is in E, option (b).
Why the other options are wrong
- (a) F
- F holds the hockey ball, not golf.
- (c) D
- Golf is stated not to be in D.
- (d) None of the above
- Golf is in E, so 'None of the above' is wrong.
Asked in the CSAT Paper II of the UPSC Civil Services Preliminary Examination 2016, held on 7 August 2016. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.