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Vietnam · Grade 7 · Practice Sheet 44

Sheet code: VIETNAM-G7-S44 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    A triangle has a base of 35 cm and a height of 11 cm. Find its area.

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

    Find the mean (average) of these numbers: 70, 76, 52, 49, 80.

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

    Find 3/5 of 40.

    Formula:Fraction of a Quantity
    result=ab×N\text{result} = \dfrac{a}{b} \times N
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  4. 4.

    VND 4,100 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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  5. 5.

    A value changes from 102 to 195. 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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  6. 6.

    VND 4,200 is invested at 8% simple interest per year for 5 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
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  7. 7.

    Find the circumference of a circle whose radius is 13 m. (Use π ≈ 3.14159)

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

    A circle has a radius of 21 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  9. 9.

    A train moves at 22 km/h for 4.1 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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  10. 10.

    A value changes from 32 to 249. 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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  11. 11.

    A train moves at 35 km/h for 2.9 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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  12. 12.

    Find the circumference of a circle whose radius is 18 m. (Use π ≈ 3.14159)

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

    What is 5% of 350?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
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  14. 14.

    A bag has 9 equally likely marbles, of which 3 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.

    Find the mean (average) of these numbers: 63, 97, 77, 36, 87, 11.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  16. 16.

    A right-angled triangle has legs of 20 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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  17. 17.

    Find 3/8 of 40.

    Formula:Fraction of a Quantity
    result=ab×N\text{result} = \dfrac{a}{b} \times N
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  18. 18.

    Find the perimeter of a rectangle measuring 30 m by 14 m.

    Formula:Perimeter of a Rectangle
    P=2(l+w)P = 2(l + w)
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  19. 19.

    A triangle has a base of 31 cm and a height of 9 cm. Find its area.

    Formula:Area of a Triangle
    A=12bhA = \tfrac{1}{2} b h
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  20. 20.

    A rectangle is 22 cm long and 16 cm wide. Find its area.

    Formula:Area of a Rectangle
    A=l×wA = l \times w
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