Question
Find the common factors of $20$ and $28$
✓
Answer
$20$ and $28$
$1 \times 20 = 20 ; 2 \times 10 = 20 ; 4 \times 5 = 20.$
Therefore Factors of $20$ are $1, 2, 4, 5, 10$ and $20.$
$1 \times 28 = 28 ; 2 \times 14 = 28 ; 7 \times 4 = 28.$
Therefore Factors of $28$ are $1, 2, 4, 7, 14$ and $28.$
Hence, the common factors of $20$ and $28$ are $1, 2$ and $4.$
$1 \times 20 = 20 ; 2 \times 10 = 20 ; 4 \times 5 = 20.$
Therefore Factors of $20$ are $1, 2, 4, 5, 10$ and $20.$
$1 \times 28 = 28 ; 2 \times 14 = 28 ; 7 \times 4 = 28.$
Therefore Factors of $28$ are $1, 2, 4, 7, 14$ and $28.$
Hence, the common factors of $20$ and $28$ are $1, 2$ and $4.$
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