Number Toolkit (Cambridge (CIE) IGCSE Maths: Extended)

Exam Questions

39 mins27 questions
1
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1 mark

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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3 marks

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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1 mark

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

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

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4
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2 marks

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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3 marks

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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1 mark

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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1 mark

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

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8
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1 mark

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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2 marks

Complete the list of factors of 36.

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

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1
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1 mark

Work out  (0.01)2 .

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2
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1 mark

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

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3
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1 mark

Write down a square number greater than 10.

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4
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1 mark

Calculate negative 12 divided by negative 2

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5
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2 marks

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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2 marks

22            17            25            41            39            4

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

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1
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1 mark

Write down an irrational number.

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2
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1 mark

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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1 mark

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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