Day 117: CDS Maths

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

Question 1
Circles. Asked once: CDS 1 2018 (same type asked 3 times) See all 3 of this type
73 $The radii of two circles are 4.5 cm and 3.5 cm respectively. The distance between the centres of the circles is 10 cm. What is the length of the transverse common tangent ?$
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Question 2
Mensuration 3D. Asked once: CDS 1 2022 (same type asked 3 times) See all 3 of this type
89 $In a shower, 5 cm of rain falls. What is the volume of water that falls on 2 hectare area of land?$
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Question 3
Number System. Asked once: CDS 1 2025 (same type asked 3 times) See all 3 of this type
47 $2^p - 1$
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Question 4
Quadratic Equations. Asked once: CDS 1 2025 (same type asked 3 times) See all 3 of this type
82 $px^2 + px + 4 = 0$
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Question 5
Ratio, Proportion and Variation. Asked once: CDS 1 2021 (same type asked 3 times) See all 3 of this type
38 $In a mixture of 80 litres of a liquid and water, 25% of the mixture is the liquid. How much water should be added to the mixture so that the liquid becomes 20% of the mixture?$
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Question 1