Syllabus Edition

First teaching 2021

Last exams 2024

|

Types of Number (CIE IGCSE Maths: Core)

Exam Questions

2 hours37 questions
1
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1 mark

Write down the reciprocal of 64.

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2
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1 mark

Write down the reciprocal of 2.

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3a
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3 marks

Using the integers from 60 to 75 only, find

i)
a multiple of 17,
[1]
ii)
the prime numbers.

[2]

3b
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1 mark

Write down the reciprocal of 7.

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4
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1 mark

Write down the reciprocal of 10.

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5a
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1 mark

Write down

a square number greater than 10,

5b
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1 mark

an irrational number.

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6a
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1 mark
32 33 34 35 36 37 38 39

From this list of numbers, write down

a multiple of 8,

6b
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1 mark
32 33 34 35 36 37 38 39

From this list of numbers, write down

a square number

6c
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1 mark
32 33 34 35 36 37 38 39

From this list of numbers, write down

a prime number.

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7
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2 marks

Write down all the factors of 15.

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8a
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1 mark

Here is a list of numbers.

87 77 57 47 27

From this list, write down

a cube number,

8b
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1 mark

a prime number.

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9
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2 marks

Write down all the factors of 24.

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10a
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1 mark
27 28 29 30 31 32 33

From the list of numbers, write down

a multiple of 7,

10b
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1 mark

a cube number,

10c
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1 mark

a prime number.

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11
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1 mark

Write down the smallest prime number.

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12a
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2 marks

Show that there is not a square number between 50 and 60.

12b
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1 mark

Write down a prime number between 50 and 60.

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13a
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1 mark

Here is a list of numbers.

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

From this list, write down

a prime number,

13b
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1 mark

an irrational number.

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14
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2 marks

Write down the six factors of 12.

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15a
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2 marks

Write down all the factors of 18.

15b
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1 mark

Write down a prime number between 40 and 50.

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16
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2 marks

Complete the list of factors of 36.

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

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17
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1 mark

Write down the reciprocal of 40.

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18
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1 mark

Write down the reciprocal of 7.

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1
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3 marks
8 15 18 33 39 41 51 57 60 81

From this list, write down

i)
a factor of 54,
[1]
ii)
a multiple of 19,
[1]
iii)
a prime number.
[1]

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2
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3 marks

Write down

i)
all the factors of 21,
[2]
ii)
a prime number between 40 and 50.
[1]

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3
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2 marks

Write down all the factors of 28.

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4a
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1 mark

qp4-0580-33-paper-3-may-2020-cie-igcse-maths

A road has 349 houses on it numbered from 1 to 349.
The diagram shows some of these houses.
The houses on the West side of the road have odd numbers.
The houses on the East side have even numbers.

Put a ring around the numbers in this list that are on the West side.

25 87 126 178 252 329

4b
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1 mark

On the East side, how many houses are there between the house numbered 168 and the house numbered 184?

4c
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2 marks

How many houses on the road have a house number that is a multiple of 39?

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5
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1 mark

Explain whyspace square root of 3 space end root is irrational.

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6
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4 marks

The diagram shows five number cards.

qp2a-0580-03-paper-3-specimen-2020-cie-igcse-maths

Put two cards side by side to show

i)
a two-digit number that is a multiple of 7,
[1]
ii)
a two-digit square number,
[1]
iii)
a two-digit cube number,
[1]
iv)
a two-digit prime number.
[1]

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7a
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2 marks

Write down all the factors of 16.

7b
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1 mark

Write down a prime number between 30 and 40.

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8
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4 marks

Write down

i)
all the factors of 18,
[2]
ii)
a square number between 30 and 50,
[1]
iii)
a prime number between 90 and 100.
[1]

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9a
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2 marks

Find the first even multiple of seven that is greater than 100.

9b
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1 mark
6 to the power of negative 1 end exponent square root of 10 8.97 cross times 10 to the power of negative 3 end exponent 7 over 5 square root of 64

From the list, write down the irrational number.

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10
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2 marks

Write down all the factors of 30.

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1
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1 mark

Write down an irrational number with a value between 6 and 7.

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2
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5 marks

Using numbers from 55 to 85, write down

i)
a multiple of 23,
[1]
ii)
a factor of 120,
[1]
iii)
a common multiple of 8 and 12,
[1]
iv)
a number that is both square and odd,
[1]
v)
a number that has exactly 2 factors.
[1]

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3
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2 marks

Write down an irrational number between 3 and 9.

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4
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1 mark

Write down a common factor of 16 and 72 that is greater than 2.

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5
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3 marks

square root of 64 space space space space space space 2.9 space space space space space space space 25 over 13 space space space space space space space square root of 97 space space space space space space space space space 39 space space space space space space space space space 47 space space space space space space space space space space 4.6 cubed space space space space space space space space 111 space space space space space space space space space 1.5 cross times 10 to the power of 6

Write down a number from this list that is

i)
prime,

[1]

ii)
a multiple of 13,
[1]
iii)
irrational.
[1]

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6
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2 marks

straight pi space space space space space space space space 3 to the power of negative 2 end exponent space space space space space space space space 3 4 over 7 space space space space space space space 33.35 percent sign space space space space space space space space square root of 3 space space space space space space space space space 0.3 space space space space space space space space space 3 to the power of 999

From this list, write down the two numbers that are irrational.

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7
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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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8
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4 marks

n is an integer and 120 space less than space n space less than space 140.

Find the value of n when it is

i)
a multiple of 45,
n space equals............................ [1]
ii)
a square number,
n space equals............................ [1]
iii)
a factor of 402,
n space equals............................ [1]
iv)
a cube number.
n space equals............................ [1]

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9
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5 marks

Find

i)
the smallest multiple of 7 that is greater than 100,
[1]
ii)
the largest cube number that is less than 100,
[1]
iii)
the six factors of 45,
[2]
iv)
an irrational number between 6 and 7.
[1]

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