5 men can complete a work in 52 days. In how many days will 13 men finish the same work?
- A)52
- B)26
- C)20✓
- D)30
Why C is correct
The work is 5 x 52 = 260 man-days. With 13 men, the time = 260/13 = 20 days.
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M04
Reasoning & Quantitative Aptitude
Arithmetic, ratios, mensuration, data interpretation, logical reasoning
36
questions
in this head
0
cite a source
rule or reference
22
subtopics
covered
UPSC publishes no per-head weightage for this test, so none is invented here. Question counts are read from the live bank when this page is built.
Subtopics in this bank
AlgebraCalendarsClocksCubes & diceLCM & HCFMensurationNumbersPercentagesProbabilityProblems on agesProfit & lossProgressionsRankingRatio & proportionSeries & sequencesSets & Venn diagramsSimple interestSpeed & racesSpeed, time & distanceStatisticsSurds & indicesTime & work
Sample questions, with the reasoning
Every served question is explained like this — including why each wrong option is wrong.
A bag contains one rupee, 50 paise and 25 paise coins in the ratio 5:6:7. If the total amount is ₹390, find the number of coins of each kind.
- A)200, 280, 240
- B)240, 200, 280
- C)200, 240, 280✓
- D)280, 240, 200
Why C is correct
Let the counts be 5x, 6x, 7x. Value = 5x(1) + 6x(0.50) + 7x(0.25) = 5x + 3x + 1.75x = 9.75x = 390, so x = 40. The counts are 200, 240 and 280.
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A constable is 114 m behind a thief. The constable runs 21 m and the thief 15 m in a minute. In what time will the constable catch the thief?
- A)16 min
- B)17 min
- C)18 min
- D)19 min✓
Why D is correct
The constable gains 21 − 15 = 6 m every minute, so closing the 114 m gap takes 114/6 = 19 minutes.
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Practise M04 with real marking
36 questions · +2.5/−⅓ UPSC marking · explanations after every answer. No sign-up needed.