1 x 18
2 x 9
3 x 6
2 x 3 x 3
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25 and 18 are a factor pair of 450 whose sum is 43.
5 + 2 = 7
Since 18 is a factor of 72, all of its factors are common.
To find the common factors of 9 and 18, we first need to list the factors of each number. The factors of 9 are 1, 3, and 9, while the factors of 18 are 1, 2, 3, 6, 9, and 18. The common factors of 9 and 18 are 1, 3, and 9. Adding these common factors together gives us a sum of 13.
It is not possible to express something as a sum of whole numbers with no common factor. All whole numbers have at least 1 as a common factor.