Question
Find the $H.C.F$ of the numbers: $30, 42$
✓
Answer
$30, 42$
Factors of $30$ are $1, 2, 3, 5, 6, 10, 15$ and $30.$
Factors of $42$ are $1, 2, 3, 6, 7, 14, 21$ and $42.$
$\therefore $ Common factors of $30$ and $42$ are $1, 2, 3$ and $6.$
Highest of these common factors is $6.$
$\therefore H.C.F.$ of $30$ and $42$ is $6.$
Factors of $30$ are $1, 2, 3, 5, 6, 10, 15$ and $30.$
Factors of $42$ are $1, 2, 3, 6, 7, 14, 21$ and $42.$
$\therefore $ Common factors of $30$ and $42$ are $1, 2, 3$ and $6.$
Highest of these common factors is $6.$
$\therefore H.C.F.$ of $30$ and $42$ is $6.$
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