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Oman · Grade 8 · Practice Sheet 48

Sheet code: OMAN-G8-S48 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    OMR 3,000 is invested at 4% 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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  2. 2.

    An object has mass 330.6 g and volume 38 cm³. Find its density.

    Formula:Density
    ρ=mV\rho = \dfrac{m}{V}
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  3. 3.

    A current of 2.4 A flows through a 58 Ω resistor. Find the voltage across it.

    Formula:Ohm's Law
    V=IRV = I R
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  4. 4.

    A value changes from 103 to 242. 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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  5. 5.

    OMR 2,900 is invested at 8% 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}
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  6. 6.

    A value changes from 133 to 22. 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.

    A circle has a radius of 7 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  8. 8.

    A car travels 222 km in 6 hours. Find its average speed.

    Formula:Speed
    v=dtv = \dfrac{d}{t}
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  9. 9.

    A force of 200 N acts on an area of 7.9 m². Find the pressure.

    Formula:Pressure
    P=FAP = \dfrac{F}{A}
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  10. 10.

    Find the circumference of a circle whose radius is 14 m. (Use π ≈ 3.14159)

    Formula:Circumference of a Circle
    C=2πrC = 2\pi r
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  11. 11.

    Find the mean (average) of these numbers: 58, 45, 28, 38, 56, 44.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  12. 12.

    A value changes from 35 to 35. 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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  13. 13.

    A bag has 20 equally likely marbles, of which 13 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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  14. 14.

    A right-angled triangle has legs of 6 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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  15. 15.

    OMR 2,200 is invested at 8% 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 →
  16. 16.

    A current of 3.4 A flows through a 18 Ω resistor. Find the voltage across it.

    Formula:Ohm's Law
    V=IRV = I R
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  17. 17.

    A right-angled triangle has legs of 7 cm and 18 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  18. 18.

    A triangle has a base of 34 cm and a height of 14 cm. Find its area.

    Formula:Area of a Triangle
    A=12bhA = \tfrac{1}{2} b h
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  19. 19.

    A circle has a radius of 25 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  20. 20.

    OMR 3,800 is invested at 6% 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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