Day 54: CDS Maths

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

Question 1
Number System. Asked 2 times: CDS 1 2019*, CDS 2 2021 (* = numbers or wording changed that year) See all 2 times it was asked
15 $Three runners are running in a circular track, and they complete one round in 20, 30 and 35 minutes respectively. When will they next meet at the starting point ?$
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Question 2
Number System. Asked 2 times: CDS 2 2020*, CDS 2 2021 (* = numbers or wording changed that year) See all 2 times it was asked
5 $The sum of LCM and HCF of two numbers is 536 and the difference between LCM and HCF is 296. If one of the numbers is 104, then what is the other number ?$
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Question 3
Percentage, Profit and Loss. Asked 2 times: CDS 2 2017*, CDS 2 2021 (* = numbers or wording changed that year) See all 2 times it was asked
43 $A person bought a chair and a table for Rs. 750. He sold the chair at a gain of 5% and the table at a gain of 20%. He gained 16% on the whole. What is original cost of table ?$
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Question 4
Quadratic Equations. Asked 2 times: CDS 2 2020, CDS 2 2021 See all 2 times it was asked
19 $x^2-4x-\log_{10}N=0$
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Question 5
Triangles. Asked 2 times: CDS 2 2020*, CDS 2 2021 (* = numbers or wording changed that year) See all 2 times it was asked
61 $The radius of circum-circle of a right-angled triangle is 10 cm and the altitude drawn to the hypotenuse is 8 cm. What is the area of the triangle ?$
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Question 1

Question 2

Question 3

Question 4

Question 5