Find the common factors of $20$ and $28$ .

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Solution

Finding the common factors of $20$ and $28$ :
Factor: A Factor of a number is an exact divisor of that number.
All the factors of $20$ are $1, 2, 4, 5, 10, 20$
All the factors of $28$ are $1, 2, 4, 7, 14, 28$
Therefore, the common factors of $20$ and $28$ are $1, 2, 4$ .

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