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 xx 7#

#14 = 2 xx 7#

Now identify the common factors and determine the GCF:

#21 = 3 xx color(red)(7)#

#14 = 2 xx color(red)(7)#

Therefore:

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