2014 CSAT, all questions

UPSC Prelims 2014 · CSAT

Question 66: Logical Reasoning and Mental Ability

Examine the following statements :

  1. 1.George attends Music classes on Monday.
  2. 2.He attends Mathematics classes on Wednesday.
  3. 3.His Literature classes are not on Friday.
  4. 4.He attends History classes on the day following the day of his Mathematics classes.
  5. 5.On Tuesday, he attends his Sports classes.

If he attends just one subject in a day and his Sunday is free, then he is also free on

aMonday
bThursday
cSaturday
dFriday

AnswerUPSC’s answer is (d).

Fix the known days: Music on Monday, Sports on Tuesday, Mathematics on Wednesday, and History on Thursday, the day after Mathematics. Sunday is free. That leaves Friday and Saturday for Literature, which cannot be on Friday, so it is on Saturday. Friday is then the other free day.

  • 1. Given: Music is on Monday.
  • 2. Given: Mathematics is on Wednesday.
  • 3. Given: Literature is not on Friday, so it falls on Saturday.
  • 4. Given: History is the day after Mathematics, so Thursday.
  • 5. Given: Sports is on Tuesday.
Why each option is right or wrong
  • (a) Music is on Monday.
  • (b) History is on Thursday.
  • (c) Literature is on Saturday.
  • (d) Right. Friday is free.

Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 2014, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.