factors of 9 are 1, 3 and 9
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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.
20 and 9 9 and 5 5, 3, 3 and 18 ones
They are 6 and 8
If a number has equal factors, it is a perfect square and the equal factors would be square roots.