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Italy · Classe 8 · Practice Sheet 41

Sheet code: ITALY-G8-S41 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    A right-angled triangle has legs of 10 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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  2. 2.

    Find the mean (average) of these numbers: 38, 72, 23, 95.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  3. 3.

    What is 5% of 60?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
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  4. 4.

    A car travels 530 km in 5 hours. Find its average speed.

    Formula:Speed
    v=dtv = \dfrac{d}{t}
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  5. 5.

    €1,100 is invested at 10% 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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  6. 6.

    A value changes from 37 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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  7. 7.

    Find the circumference of a circle whose radius is 6 m. (Use π ≈ 3.14159)

    Formula:Circumference of a Circle
    C=2πrC = 2\pi r
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  8. 8.

    Solve for x: 5x + 11 = 36.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  9. 9.

    A value changes from 108 to 167. 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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  10. 10.

    Solve for x: 9x + 17 = 89.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  11. 11.

    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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  12. 12.

    Find the mean (average) of these numbers: 83, 69, 80, 37, 32.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  13. 13.

    A circle has a radius of 13 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 force of 152 N acts on an area of 7.8 m². Find the pressure.

    Formula:Pressure
    P=FAP = \dfrac{F}{A}
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  15. 15.

    An object has mass 273.9 g and volume 33 cm³. Find its density.

    Formula:Density
    ρ=mV\rho = \dfrac{m}{V}
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  16. 16.

    A right-angled triangle has legs of 17 cm and 13 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  17. 17.

    Find the mean (average) of these numbers: 12, 98, 75, 10.

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

    A cylinder has radius 13 cm and height 26 cm. Find its volume. (π ≈ 3.14159)

    Formula:Volume of a Cylinder
    V=πr2hV = \pi r^2 h
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  19. 19.

    Solve for x: 9x + 11 = 65.

    Formula:Solving a Linear Equation
    x=c−bax = \dfrac{c - b}{a}
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  20. 20.

    A force of 459 N acts on an area of 4.5 m². Find the pressure.

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