Question
Find the common factors of: $15$ and $25$

Answer

$15$ and $25$
$15 = 1 \times 15$
$15 = 3 \times 5$
i.e., the factors of $15$ are $1, 3, 5$ and $15.$
Again, $25 = 1 \times 25$
$25 = 5 \times 5$
i.e., the factors of $25$ are $1, 5$ and $25. $
Therefore, the common factors of the two numbers are $1$ and $5.$

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