IGCSEMaths: ExtendedCIETopic QuestionsNumberNumber Toolkit

Syllabus Edition

First teaching 2023

First exams 2025

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Number Toolkit (CIE IGCSE Maths: Extended)

Topic Questions

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1
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At noon the temperature in Maseru was 21°C.
At midnight the temperature had fallen by 26 °C.
 
Work out the temperature at midnight.
 

............................................. °C

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2
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32 space space space space 33 space space space space 34 space space space space 35 space space space space 36 space space space space 37 space space space space 38 space space space space 39

From the list of numbers, write down

i)
a multiple of 8,

[1]

ii)
a square number,

[1]

iii)
a prime number.

[1]

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3
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Write down the temperature that is 7 °C below -3 °C.

............................................... °C

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4
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Here is a list of numbers.

87          77          57          47          27

From this list, write down

i)
 a cube number,

[1]

ii)

a prime number.

[1]

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5
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27 28 29 30 31 32 33

From the list of numbers, write down

i)
a multiple of 7,

[1]

ii)
a cube number,

[1]

iii)
a prime number.

[1]

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6
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The temperature at 07 00 is -3 °C.
This temperature is 11 °C higher than the temperature at 01 00.
 
Find the temperature at 01 00.

................................................ °C

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7
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Write the number five million, two hundred and seven in figures.

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8
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One day in Chamonix the temperature at noon was 6°C.
At midnight the temperature was 11°C lower.

Write down the temperature at midnight.

............................................ °C

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9
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Complete the list of factors of 36.

1, 2, ............................................. , 36

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1
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Write down an irrational number.

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2
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Insert one pair of brackets to make this calculation correct.

7 space space minus space space 5 space space minus space space 3 space space plus space space 4 space space equals space space 9

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3
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a is a prime number.

b is an even number.

N space equals space a squared space plus space a b

Circle the correct statement about N.

could be
even or odd		 always even
always prime always odd

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1
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Work out  (0.01)2 .

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2
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Write down the cube number that is greater than 50 but less than 100.

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3
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Write down a square number greater than 10.

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4
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Calculate negative 12 divided by negative 2. 

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5
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Here is a list of numbers.

 21   2 over 3   square root of 13   31   square root of 121   51   0.7 

From this list, write down

i)
a prime number,
[1]
ii)
an irrational number.

[1]

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6
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22            17            25            41            39            4

Work out the difference between the two prime numbers in the list above.

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