Factors are multiplied, not added. The question needs to be something like, "Which two factors of thirty add up to 11?" The answer would then be 5 and 6.
Factors multiply, like 1 x 11. Addends add, like 5 and 6.
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no 11 is not a perfect number because when u add the factors the don't add up to 11
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15 and 4 are the factors of 120 that add up to 19.
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