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How do you find the GCF of 20, 21 and 25?

Answer 1

Autumn Arnold

1

factors:

#20:{1,2,4,5,10,20}#

#21:{1,3,7,21}#

#25:[1,5,25]#

#GCF =1#

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Answer 2

Levi Adams

To find the greatest common factor (GCF) of 20, 21, and 25, you can use prime factorization.

Prime factorize each number:
- 20 = 2^2 * 5
- 21 = 3 * 7
- 25 = 5^2
Identify the common prime factors: The only common prime factor among the three numbers is 1.
Multiply the common prime factors together: The GCF of 20, 21, and 25 is 1.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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