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Iraq · Grade 8 · Practice Sheet 29

Sheet code: IRAQ-G8-S29 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    IQD 2,600 is invested at 4% simple interest per year for 4 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
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  2. 2.

    What is 50% of 130?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
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  3. 3.

    A right-angled triangle has legs of 3 cm and 15 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  4. 4.

    An object has mass 209.1 g and volume 41 cm³. Find its density.

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

    A right-angled triangle has legs of 5 cm and 7 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  6. 6.

    IQD 60 is shared in the ratio 2 : 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 + 13 = 85.

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

    A cylinder has radius 9 cm and height 23 cm. Find its volume. (π ≈ 3.14159)

    Formula:Volume of a Cylinder
    V=πr2hV = \pi r^2 h
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  9. 9.

    Find the mean (average) of these numbers: 41, 69, 13, 76, 43.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  10. 10.

    IQD 600 is invested at 10% 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.

    A circle has a radius of 12 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  12. 12.

    A force of 140 N acts on an area of 9.1 m². Find the pressure.

    Formula:Pressure
    P=FAP = \dfrac{F}{A}
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  13. 13.

    Solve for x: 2x + 14 = 30.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  14. 14.

    A cylinder has radius 8 cm and height 15 cm. Find its volume. (π ≈ 3.14159)

    Formula:Volume of a Cylinder
    V=πr2hV = \pi r^2 h
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  15. 15.

    A right-angled triangle has legs of 18 cm and 16 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  16. 16.

    A value changes from 153 to 209. 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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  17. 17.

    Find the mean (average) of these numbers: 52, 38, 23, 50, 76.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  18. 18.

    A circle has a radius of 22 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  19. 19.

    A train moves at 30 km/h for 5.3 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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  20. 20.

    A right-angled triangle has legs of 16 cm and 19 cm. Find the length of the hypotenuse.

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