How do you find the GCF of 3 and 9?

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Answer 1 · 2018-03-06T14:59:48

See a solution process below:

Find the prime factors for each number as:

$3 = 3$ $3 = 3$

$3$ $3$ is a prime number and cannot be factored

$9 = 3 \times 3$ $9 = 3 xx 3$

Now identify the common factors and determine the GCF:

$3 = 3$ $3 = color(red)(3)$

$9 = 3 \times 3$ $9 = color(red)(3) xx 3$

Therefore:

$GCF = 3$ $"GCF" = color(red)(3)$