2012 CSAT, all questions

UPSC Prelims 2012 · CSAT

Question 57: Logical Reasoning and Mental Ability

Examine the information given in the following paragraph and answer the items that follow : · as printed by UPSC
Passage beginning “Guest lectures on five subjects viz.,…”

Which lecture is scheduled on Monday ?

aHistory
bEconomics
cMathematics
dStatistics

AnswerUPSC’s answer is (d).

Five lectures, Monday to Friday, one per day. History is available only on Tuesday, so History is on Tuesday. English, Economics and Mathematics must run on three consecutive days in that order, since Mathematics comes right after Economics and English right before it. They cannot include Tuesday, so they take Wednesday, Thursday and Friday: English, Economics, Mathematics. Statistics gets the one day left, Monday.

Why each option is right or wrong
  • (a) Wrong. History is possible only on Tuesday.
  • (b) Wrong. Economics falls on Thursday.
  • (c) Wrong. Mathematics falls on Friday.
  • (d) Right. Statistics takes the one day left, Monday.

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

Source: UPSC, Civil Services (Preliminary) Examination 2012, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.