Day 275: CDS Maths

5 questions. Try each one first, then open its answer.

Question 1
Sets. Asked once: CDS 2 2016
10 $A = \{7, 8, 9, 10, 11, 12\}$
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Question 2
Simple and Compound Interest. Asked once: CDS 1 2018
30 $A person borrowed Rs. 5,000 at 5% rate of interest per annum and immediately lent it at 5.5%. After two years he collected the amount and settled his loan. What is the amount gained by him in this transaction?$
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Question 3
Statistics. Asked once: CDS 2 2018
55 $Data on ratings of hotels in a city is measured on$
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Question 4
Surds, Indices and Simplification. Asked once: CDS 1 2021
26 $Which one of the following fractions will have minimum change in its value if 3 is added to both the numerator and the denominator of all the fractions?$
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Question 5
Time, Speed and Distance. Asked once: CDS 2 2018
30 $In a race of 1000 m, A beats B by 150 m, while in another race of 3000 m, C beats D by 400 m. Speed of B is equal to that of D. (Assume that A, B, C and D run with uniform speed in all the events). If A and C participate in a race of 6000 m, then which one of the following is correct ?$
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Question 1