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Number

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Integers, Fractions, Decimals, and Percentages

Subtopic

Integers, Fractions, Decimals, and Percentages under Number for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Write the fraction 720\frac{7}{20} as a decimal.

    A.

    0.350.35

    B.

    0.70.7

    C.

    0.140.14

    D.

    0.070.07

  2. 2.

    Evaluate 14+(−20)14 + (-20).

    A.

    3434

    B.

    −34-34

    C.

    −6-6

    D.

    66

  3. 3.

    Convert the decimal 0.020.02 into a percentage.

    A.

    0.2%0.2\%

    B.

    2%2\%

    C.

    20%20\%

    D.

    0.02%0.02\%

Download the worksheet for Number - Integers, Fractions, Decimals, and Percentages to practice offline. It includes additional chapter-level practice questions.

Prime Factors, HCF, and LCM

Subtopic

Prime Factors, HCF, and LCM under Number for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the prime factorization of 1414?

    A.

    2×72 \times 7

    B.

    1×141 \times 14

    C.

    2+122 + 12

    D.

    727^2

  2. 2.

    What is the LCM of 2,3,2, 3, and 44?

    A.

    66

    B.

    1212

    C.

    2424

    D.

    44

  3. 3.

    Find the HCF of 1111 and 1313.

    A.

    11

    B.

    1111

    C.

    1313

    D.

    143143

Download the worksheet for Number - Prime Factors, HCF, and LCM to practice offline. It includes additional chapter-level practice questions.

Powers, Roots, and Laws of Indices

Subtopic

Powers, Roots, and Laws of Indices under Number for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Evaluate the expression: 1+0\sqrt{1} + \sqrt{0}.

    A.

    0

    B.

    1

    C.

    2

    D.

    undefined

  2. 2.

    Simplify n0×n5n^0 \times n^5.

    A.

    0

    B.

    n0n^0

    C.

    n5n^5

    D.

    n1n^1

  3. 3.

    Simplify (m3)3(m^3)^3.

    A.

    m6m^6

    B.

    m9m^9

    C.

    m27m^{27}

    D.

    3m33m^3

Download the worksheet for Number - Powers, Roots, and Laws of Indices to practice offline. It includes additional chapter-level practice questions.

Ratio and Proportion

Subtopic

Ratio and Proportion under Number for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Divide 4040 into the ratio 1:3:41:3:4. What are the values?

    A.

    5,15,205, 15, 20

    B.

    4,12,244, 12, 24

    C.

    10,10,2010, 10, 20

    D.

    8,12,208, 12, 20

  2. 2.

    Solve for xx: x:30=1:5x:30 = 1:5.

    A.

    55

    B.

    150150

    C.

    66

    D.

    1010

  3. 3.

    Express the ratio 2.5 kg2.5\text{ kg} to 500 g500\text{ g} in simplest form.

    A.

    1:21:2

    B.

    5:15:1

    C.

    2:52:5

    D.

    1:51:5

Download the worksheet for Number - Ratio and Proportion to practice offline. It includes additional chapter-level practice questions.

Standard Form (Scientific Notation)

Subtopic

Standard Form (Scientific Notation) under Number for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is 0.00000060.0000006 in standard form?

    A.

    6×10−66 \times 10^{-6}

    B.

    6×10−76 \times 10^{-7}

    C.

    0.6×10−60.6 \times 10^{-6}

    D.

    60×10−860 \times 10^{-8}

  2. 2.

    Write 80,00080,000 in standard form.

    A.

    8×1038 \times 10^3

    B.

    80×10380 \times 10^3

    C.

    8×1048 \times 10^4

    D.

    0.8×1050.8 \times 10^5

  3. 3.

    Express 9.01×10−39.01 \times 10^{-3} as a decimal.

    A.

    0.09010.0901

    B.

    0.009010.00901

    C.

    0.0009010.000901

    D.

    901901

Download the worksheet for Number - Standard Form (Scientific Notation) to practice offline. It includes additional chapter-level practice questions.

Rounding, Estimation, and Upper/Lower Bounds

Subtopic

Rounding, Estimation, and Upper/Lower Bounds under Number for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Round 0.00008510.0000851 to 11 significant figure.

    A.

    0.000090.00009

    B.

    0.000080.00008

    C.

    0.00010.0001

    D.

    0.0000850.000085

  2. 2.

    What is the upper bound of 300300 rounded to the nearest 100100?

    A.

    350350

    B.

    305305

    C.

    400400

    D.

    349349

  3. 3.

    Estimate the value of 4.1+5.91.8\frac{4.1 + 5.9}{1.8} by rounding each to 11 significant figure.

    A.

    55

    B.

    1010

    C.

    44

    D.

    66

Download the worksheet for Number - Rounding, Estimation, and Upper/Lower Bounds to practice offline. It includes additional chapter-level practice questions.

Number - IGCSE Grade 8 Maths Notes & Revision | Krit.club