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Day 138: CDS Maths

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

  1. Question 1

    Number System. Asked once: CDS 1 2019 (same type asked 2 times) See all 2 of this type

    13
    HCF of two numbers is 12. Which one of the following can never be their LCM ?

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  2. Question 2

    Quadratic Equations. Asked once: CDS 2 2021 (same type asked 2 times) See all 2 of this type

    10
    The sum and the product of the roots of a quadratic equation are 7 and 12 respectively. If the bigger root is halved and the smaller root is doubled, then what is the resulting quadratic equation ?

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  3. Question 3

    Triangles. Asked once: CDS 2 2019 (same type asked 2 times) See all 2 of this type

    83
    The hypotenuse of a right-angled triangle is 10 cm and its area is 24 cm2\text{cm}^2. If the shorter side is halved and the longer side is doubled, the new hypotenuse becomes

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  4. Question 4

    Heights and Distances. Asked once: CDS 1 2018 (same type asked 2 times) See all 2 of this type

    58
    Each side of a square subtends an angle of 60∘60^\circ at the tip of a tower of height h metres standing at the centre of the square. If ll is the length of each side of the square, then what is h2h^2 equal to ?

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  5. Question 5

    Mensuration 2D. Asked once: CDS 1 2022 (same type asked 2 times) See all 2 of this type

    88
    What is the radius of the circle inscribed in a triangle whose sides are 4 cm, 7.5 cm and 8.5 cm?

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