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Day 207: CDS Maths

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

  1. Question 1

    Statistics. Asked once: CDS 2 2017 (same type asked 7 times) See all 7 of this type

    99
    The heights (in cm) of 5 students are 150, 165, 161, 144 and 155. What are the values of mean and median (in cm) respectively ?

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  2. Question 2

    Quadratic Equations. Asked once: CDS 2 2021 (same type asked 6 times) See all 6 of this type

    31
    If one of the roots of the equation ax2−4ax+15=0ax^2-4ax+15=0 is 32\frac{3}{2}, then what is the sum of the squares of the roots ?

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  3. Question 3

    Time and Work. Asked once: CDS 1 2017 (same type asked 6 times) See all 6 of this type

    24
    If 15 men take 21 days of 8 hours each to do a piece of work, then what is the number of days of 6 hours each that 21 women would take, if 3 women would do as much work as 2 men ?

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  4. Question 4

    Mensuration 2D. Asked once: CDS 1 2019 (same type asked 6 times) See all 6 of this type

    54
    A piece of wire of length 33 cm is bent into an arc of a circle of radius 14 cm. What is the angle subtended by the arc at the centre of the circle ?

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  5. Question 5

    Mensuration 2D. Asked once: CDS 1 2017 (same type asked 6 times) See all 6 of this type

    83
    A copper wire when bent in the form of a square encloses an area of 121 cm2121 \text{ cm}^2. If the same wire is bent in the form of a circle, it encloses an area equal to

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