How do you find the GCF of 21 and 14?

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Answer 1 · 2018-03-10T03:03:31

See a solution process below:

Find the prime factors for each number as:

$21 = 3 \times 7$ $21 = 3 xx 7$

$14 = 2 \times 7$ $14 = 2 xx 7$

Now identify the common factors and determine the GCF:

$21 = 3 \times 7$ $21 = 3 xx color(red)(7)$

$14 = 2 \times 7$ $14 = 2 xx color(red)(7)$

Therefore:

$GCF = 7$ $"GCF" = color(red)(7)$