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Morocco · Grade 8 · Practice Sheet 42

Sheet code: MOROCCO-G8-S42 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    A value changes from 159 to 161. Find the percentage change (to 2 d.p.).

    Formula:Percentage Change
    % change=new−oldold×100\%\,\text{change} = \dfrac{\text{new} - \text{old}}{\text{old}} \times 100
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  2. 2.

    A right-angled triangle has legs of 4 cm and 5 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  3. 3.

    A value changes from 44 to 196. Find the percentage change (to 2 d.p.).

    Formula:Percentage Change
    % change=new−oldold×100\%\,\text{change} = \dfrac{\text{new} - \text{old}}{\text{old}} \times 100
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  4. 4.

    An object has mass 32.5 g and volume 13 cm³. Find its density.

    Formula:Density
    ρ=mV\rho = \dfrac{m}{V}
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  5. 5.

    Solve for x: 4x + 2 = 34.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  6. 6.

    MAD 34 is shared in the ratio 1 : 1. Find each share.

    Formula:Dividing in a Ratio
    share=parttotal parts×T\text{share} = \dfrac{\text{part}}{\text{total parts}} \times T
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  7. 7.

    Solve for x: 9x + 9 = 99.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  8. 8.

    Find the circumference of a circle whose radius is 15 m. (Use π ≈ 3.14159)

    Formula:Circumference of a Circle
    C=2πrC = 2\pi r
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  9. 9.

    A circle has a radius of 7 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  10. 10.

    MAD 1,200 is invested at 8% simple interest per year for 3 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
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  11. 11.

    An object has mass 181.3 g and volume 49 cm³. Find its density.

    Formula:Density
    ρ=mV\rho = \dfrac{m}{V}
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  12. 12.

    A current of 6.8 A flows through a 29 Ω resistor. Find the voltage across it.

    Formula:Ohm's Law
    V=IRV = I R
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  13. 13.

    A circle has a radius of 17 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  14. 14.

    A bag has 25 equally likely marbles, of which 4 are red. Find the probability of drawing a red marble (to 3 d.p.).

    Formula:Simple Probability
    P(E)=favourabletotalP(E) = \dfrac{\text{favourable}}{\text{total}}
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  15. 15.

    A circle has a radius of 17 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  16. 16.

    A current of 5.3 A flows through a 17 Ω resistor. Find the voltage across it.

    Formula:Ohm's Law
    V=IRV = I R
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  17. 17.

    A circle has a radius of 7 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  18. 18.

    A value changes from 171 to 259. Find the percentage change (to 2 d.p.).

    Formula:Percentage Change
    % change=new−oldold×100\%\,\text{change} = \dfrac{\text{new} - \text{old}}{\text{old}} \times 100
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  19. 19.

    A force of 116 N acts on an area of 7.6 m². Find the pressure.

    Formula:Pressure
    P=FAP = \dfrac{F}{A}
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  20. 20.

    A train moves at 68 km/h for 4.6 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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