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Algeria · Grade 8 · Practice Sheet 19

Sheet code: ALGERIA-G8-S19 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    A force of 490 N acts on an area of 1.2 m². Find the pressure.

    Formula:Pressure
    P=FAP = \dfrac{F}{A}
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  2. 2.

    A right-angled triangle has legs of 4 cm and 11 cm. Find the length of the hypotenuse.

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

    DA 4,900 is invested at 5% 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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  4. 4.

    What is 30% of 310?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
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  5. 5.

    A right-angled triangle has legs of 3 cm and 12 cm. Find the length of the hypotenuse.

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

    Solve for x: 8x + 4 = 52.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  7. 7.

    DA 1,300 is invested at 3% simple interest per year for 6 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
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  8. 8.

    A value changes from 41 to 221. 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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  9. 9.

    A triangle has a base of 34 cm and a height of 13 cm. Find its area.

    Formula:Area of a Triangle
    A=12bhA = \tfrac{1}{2} b h
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  10. 10.

    Find the mean (average) of these numbers: 17, 41, 60, 53.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  11. 11.

    A right-angled triangle has legs of 5 cm and 8 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  12. 12.

    Find the circumference of a circle whose radius is 17 m. (Use π ≈ 3.14159)

    Formula:Circumference of a Circle
    C=2πrC = 2\pi r
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  13. 13.

    DA 500 is invested at 10% 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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  14. 14.

    A train moves at 67 km/h for 2.8 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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  15. 15.

    A circle has a radius of 9 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 force of 251 N acts on an area of 4.8 m². Find the pressure.

    Formula:Pressure
    P=FAP = \dfrac{F}{A}
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  17. 17.

    Solve for x: 3x + 10 = 16.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  18. 18.

    DA 1,700 is invested at 5% simple interest per year for 6 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
    View formula →
  19. 19.

    A value changes from 144 to 55. 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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  20. 20.

    A force of 425 N acts on an area of 8.2 m². Find the pressure.

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