Day 144: CDS Maths

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

Question 1
Linear Equations. Asked once: CDS 1 2020 (same type asked 2 times) See all 2 of this type
31 $Students of a class are made to sit in rows of equal number of chairs. If number of students is increased by 2 in each row, then the number of rows decreases by 3. If number of students is increased by 4 in each row, then the number of rows decreases by 5. What is the number of students in the class ?$
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Question 2
Mensuration 2D. Asked once: CDS 1 2017 (same type asked 2 times) See all 2 of this type
74 $The areas of two circular fields are in the ratio 16 : 49. If the radius of the bigger field is 14 m, then what is the radius of the smaller field ?$
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Question 3
Number System. Asked once: CDS 1 2020 (same type asked 2 times) See all 2 of this type
1 $2 \times 3 \times 5 \times 7 \times 11 + 1$
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Question 4
Percentage, Profit and Loss. Asked once: CDS 2 2019 (same type asked 2 times) See all 2 of this type
35 $If an article is sold at a gain of 6% instead of a loss of 6%, the seller gets Rs. 6 more. What is the cost price of the article ?$
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Question 5
Polynomials. Asked once: CDS 1 2020 (same type asked 2 times) See all 2 of this type
23 $2401x^4 + 196x^2 + 4$
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Question 1