2015 CSAT, all questions

UPSC Prelims 2015 · CSAT

Question 60: Logical Reasoning and Mental Ability

Usha runs faster than Kamala, Priti runs slower than Swati, Swati runs slower than Kamala. Who is the slowest runner ?

aKamala
bPriti
cSwati
dUsha

AnswerUPSC’s answer is (b).

Write the order from each clue. Usha is faster than Kamala; Swati is slower than Kamala; Priti is slower than Swati. Chain: Usha > Kamala > Swati > Priti. So Priti is the slowest, with Usha fastest. When several comparisons are given, link them into a single chain.

Why each option is right or wrong
  • (a) Wrong: Kamala is faster than Swati and Priti.
  • (b) Right: Priti is slower than Swati, who is slower than Kamala, who is slower than Usha.
  • (c) Wrong: Swati is faster than Priti.
  • (d) Wrong: Usha is the fastest.

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

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Source: UPSC, Civil Services (Preliminary) Examination 2015, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.