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Question
Write all the factors of the following number.
18
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Solution
18 = 1 × 18,
18 = 2 × 9,
18 = 3 × 6,
18 = 6 × 3
Thus, all the factors of 18 are 1, 2, 3, 4, 6, 9, and 18.
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Match the items in column 1 with the items in column 2.
|
|
Column 1 |
|
Column 2 |
|
(i) |
35 |
(a) |
Multiple of 8 |
|
(ii) |
15 |
(b) |
Multiple of 7 |
|
(iii) |
16 |
(c) |
Multiple of 70 |
|
(iv) |
20 |
(d) |
Factor of 30 |
|
(v) |
25 |
(e) |
Factor of 50 |
|
|
|
(f) |
Factor of 20 |
If 6 is a common factor of two numbers, which could be the pair?
