Write down all the factors of 28.
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Write 54 as a product of its prime factors.
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Find the lowest common multiple (LCM) of 48 and 60.
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32
33
34
35
36
37
38
39
From this list of numbers,
Write down
(a) a multiple of 8,
................................................. [1]
(b) a square number,
................................................. [1]
(c) a prime number.
................................................. [1]
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]
Write down
(a) a square number greater than 10,
................................................. [1]
(b) an irrational number.
................................................. [1]
(a) Using the integers from 60 to 75 only, find
(i) a multiple of 17,
................................................. [1]
(ii) the prime numbers.
................................................. [2]
1, 2, 3, 5 and 7 are all common factors of two numbers.
Write down the digit that the two numbers must end in.
................................................. [1]
Write 84 as a product of its prime factors.
................................................. [2]
Find the lowest common multiple (LCM) of 32 and 44.
................................................. [2]
Find the Highest common factor (HCF) of 12 and 18
................................................. [2]
Find the Highest common factor (HCF) of 27 and 81
................................................. [2]