Question Library
Browse our collection of questions across various subjects
Mathematics
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The ratio of the sum and difference of the ages of the father and the son is 11 : 3.…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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There are n zeros appearing immediately after the decimal point in the value of (0·2)²⁵. It is given that the…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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Twelve (12) persons can paint 10 identical rooms in 16 days. In how many days can 8 persons paint 20…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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X and Y together can finish a job in 6 days. X can alone do the same job in 12…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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A thief steals a car parked in a house and goes away with a speed of 40 kmph. The theft…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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The minute hand of a clock overtakes the hour hand after every 72 minutes of correct time. How much time…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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A milk vendor bought 28 litres of milk at the rate of ₹ 8·50 per litre. After adding some water…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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Twelve (12) men work 8 hours per day and require 10 days to build a wall. If 8 men are…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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Two equal amounts were borrowed at 5% and 4% simple interest. The total interest after 4 years amounted to ₹…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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In a class of 60 boys, there are 45 boys who play chess and 30 boys who play carrom. If…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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Ten (10) years before, the ages of a mother and her daughter were in the ratio 3 : 1. In…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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X bought 4 bottles of lemon juice and Y bought 1 bottle of orange juice. Orange juice per bottle costs…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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According to Mr. Sharma’s will, half of his property goes to his wife and the rest is equally divided between…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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A person bought two articles X and Y from a departmental store. The sum of prices before sales tax was…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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Out of 85 children playing badminton or table tennis or both, the total number of girls in the group is…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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‘A’ is thrice as good a workman as ‘B’ and takes 10 days less to do a piece of work…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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The sum of ages of a father, a mother, a son Sonu and daughters Savita and Sonia is 96 years.…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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In a race of 1000 m, A beats B by 150 m, while in another race of 3000 m, C…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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A cyclist covers his first 20 km at an average speed of 40 kmph, another 10 km at an average…
CDS Elementary Mathematics 2018
CDS 2018
Mathematics
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A train 100 m long passes a platform 100 m long in 10 seconds. The speed of the train is
CDS Elementary Mathematics 2018
CDS 2018