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Number

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

Fractions, Decimals, and Percentages

Subtopic

Fractions, Decimals, and Percentages under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Write 0.6250.625 as a fraction in its simplest form.

    A.

    38\frac{3}{8}

    B.

    58\frac{5}{8}

    C.

    78\frac{7}{8}

    D.

    12\frac{1}{2}

  2. 2.

    Simplify the fraction 1824\frac{18}{24} to its lowest terms.

    A.

    23\frac{2}{3}

    B.

    912\frac{9}{12}

    C.

    34\frac{3}{4}

    D.

    68\frac{6}{8}

  3. 3.

    What is 20%20\% of 0.50.5?

    A.

    0.01

    B.

    0.1

    C.

    0.25

    D.

    0.05

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

Ratio, Proportion, and Rate

Subtopic

Ratio, Proportion, and Rate under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A tap fills a 2020-liter bucket in 44 minutes. What is the rate of water flow in liters per minute?

    A.

    44 L/min

    B.

    55 L/min

    C.

    1010 L/min

    D.

    8080 L/min

  2. 2.

    On a map with a scale of 1:2 0001:2\,000, a road is 55 cm long. What is the actual length of the road in meters?

    A.

    1010 m

    B.

    100100 m

    C.

    10001000 m

    D.

    1000010000 m

  3. 3.

    Simplify the ratio 12:14\frac{1}{2} : \frac{1}{4} to its simplest form.

    A.

    1:21:2

    B.

    2:12:1

    C.

    1:41:4

    D.

    4:14:1

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

Indices and Standard Form

Subtopic

Indices and Standard Form under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Simplify 92×909^2 \times 9^0.

    A.

    0

    B.

    1

    C.

    81

    D.

    9

  2. 2.

    Write 0.0000000010.000000001 in standard form.

    A.

    1×10−91 \times 10^{-9}

    B.

    1×10−81 \times 10^{-8}

    C.

    10×10−910 \times 10^{-9}

    D.

    1×10−101 \times 10^{-10}

  3. 3.

    Express 700,000,000700,000,000 in standard form.

    A.

    7×1077 \times 10^7

    B.

    7×1087 \times 10^8

    C.

    70×10770 \times 10^7

    D.

    0.7×1090.7 \times 10^9

Download the worksheet for Number - Indices and Standard Form to practice offline. It includes additional chapter-level practice questions.

Set Theory and Venn Diagrams

Subtopic

Set Theory and Venn Diagrams under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following sets is equal to {2,4,6}\{2, 4, 6\}?

    A.

    {4,2,6}\{4, 2, 6\}

    B.

    {2,4}\{2, 4\}

    C.

    {6,8,10}\{6, 8, 10\}

    D.

    {1,2,3}\{1, 2, 3\}

  2. 2.

    If A∪B=BA \cup B = B, then:

    A.

    B⊂AB \subset A

    B.

    A⊂BA \subset B

    C.

    A∩B=∅A \cap B = \emptyset

    D.

    A=∅A = \emptyset

  3. 3.

    If E={1,2,3,4,5,6,7,8,9,10}\mathcal{E} = \{1, 2, 3, 4, 5, 6, 7, 8, 9, 10\} and C={x:x is a composite number}C = \{x : x \text{ is a composite number}\}, find n(C)n(C).

    A.

    4

    B.

    5

    C.

    6

    D.

    7

Download the worksheet for Number - Set Theory and Venn Diagrams to practice offline. It includes additional chapter-level practice questions.

Surds and Irrational Numbers

Subtopic

Surds and Irrational Numbers under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the simplest form of 125\sqrt{125}?

    A.

    555\sqrt{5}

    B.

    25525\sqrt{5}

    C.

    5255\sqrt{25}

    D.

    15515\sqrt{5}

  2. 2.

    Express 200\sqrt{200} in the form 10k10\sqrt{k}.

    A.

    102010\sqrt{20}

    B.

    101010\sqrt{10}

    C.

    10210\sqrt{2}

    D.

    1020010\sqrt{200}

  3. 3.

    Divide the surd: 83÷28\sqrt{3} \div 2.

    A.

    41.54\sqrt{1.5}

    B.

    434\sqrt{3}

    C.

    81.58\sqrt{1.5}

    D.

    16316\sqrt{3}

Download the worksheet for Number - Surds and Irrational Numbers to practice offline. It includes additional chapter-level practice questions.

Simple and Compound Interest

Subtopic

Simple and Compound Interest under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Calculate the compound interest earned on $2000\$2000 at a rate of 5%5\% per year for 22 years.

    A.

    $200\$200

    B.

    $2205\$2205

    C.

    $210\$210

    D.

    $205\$205

  2. 2.

    An investment of $1000\$1000 earns compound interest at a rate of 10%10\% per year. What is the total value of the investment after 22 years?

    A.

    $1100\$1100

    B.

    $1200\$1200

    C.

    $1210\$1210

    D.

    $1110\$1110

  3. 3.

    James borrows $1200\$1200 at a simple interest rate of 5%5\% per year. Calculate the total amount he must pay back at the end of 22 years.

    A.

    $1320\$1320

    B.

    $1260\$1260

    C.

    $120\$120

    D.

    $1440\$1440

Download the worksheet for Number - Simple and Compound Interest to practice offline. It includes additional chapter-level practice questions.

Upper and Lower Bounds

Subtopic

Upper and Lower Bounds under Number for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A volume is recorded as 3.003.00 litres, correct to 22 decimal places. What is the upper bound of the volume?

    A.

    3.0053.005 litres

    B.

    3.013.01 litres

    C.

    3.053.05 litres

    D.

    3.0043.004 litres

  2. 2.

    A distance is given as 260260 m, correct to 22 significant figures. What is the lower bound of this distance?

    A.

    259.5259.5 m

    B.

    250250 m

    C.

    265265 m

    D.

    255255 m

  3. 3.

    The length of a piece of string is 8.48.4 cm, correct to one decimal place. What is the upper bound of the length?

    A.

    8.458.45 cm

    B.

    8.58.5 cm

    C.

    8.448.44 cm

    D.

    8.498.49 cm

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