View solutions
FormulaWon

Vietnam · Grade 8 · Practice Sheet 45

Sheet code: VIETNAM-G8-S45 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    Find the mean (average) of these numbers: 86, 41, 40, 62, 64, 63.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
    View formula →
  2. 2.

    VND 3,600 is invested at 7.5% simple interest per year for 2 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
    View formula →
  3. 3.

    A train moves at 27 km/h for 6 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
    View formula →
  4. 4.

    A car travels 540 km in 6 hours. Find its average speed.

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

    What is 12% of 190?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
    View formula →
  6. 6.

    A train moves at 91 km/h for 2.4 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
    View formula →
  7. 7.

    Find the mean (average) of these numbers: 21, 94, 46, 62.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
    View formula →
  8. 8.

    What is 75% of 220?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
    View formula →
  9. 9.

    A bag has 11 equally likely marbles, of which 1 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}}
    View formula →
  10. 10.

    An object has mass 38.5 g and volume 5 cm³. Find its density.

    Formula:Density
    ρ=mV\rho = \dfrac{m}{V}
    View formula →
  11. 11.

    A right-angled triangle has legs of 18 cm and 17 cm. Find the length of the hypotenuse.

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

    VND 182 is shared in the ratio 4 : 3. Find each share.

    Formula:Dividing in a Ratio
    share=parttotal parts×T\text{share} = \dfrac{\text{part}}{\text{total parts}} \times T
    View formula →
  13. 13.

    A right-angled triangle has legs of 15 cm and 4 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
    View formula →
  14. 14.

    A car travels 296 km in 8 hours. Find its average speed.

    Formula:Speed
    v=dtv = \dfrac{d}{t}
    View formula →
  15. 15.

    A value changes from 146 to 171. 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
    View formula →
  16. 16.

    A circle has a radius of 20 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
    View formula →
  17. 17.

    An object has mass 118.8 g and volume 18 cm³. Find its density.

    Formula:Density
    ρ=mV\rho = \dfrac{m}{V}
    View formula →
  18. 18.

    A car travels 441 km in 7 hours. Find its average speed.

    Formula:Speed
    v=dtv = \dfrac{d}{t}
    View formula →
  19. 19.

    Solve for x: 2x + 14 = 26.

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

    A car travels 721 km in 7 hours. Find its average speed.

    Formula:Speed
    v=dtv = \dfrac{d}{t}
    View formula →

© FormulaWon — formulawon.app · Answers & step-by-step working available on the solutions sheet.

Go to full solutions for this sheet