Respuesta :

Since these are low numbers, to find the GCF think of the highest number that can divide into 15 and 20 evenly, which would be 5. 
TheBlueFox

Answer: 5

Step-by-step explanation: To find the GCF or greatest common factor of 15 and 20, we first list the factors of 15 which are 1, 3, 5, and 15.

Next, we list the the factors of 20 which are 1, 2, 4, 5, 10, and 20.

Finally, we compare the lists to find the largest shared factor which is 5.

So the greatest common factor of 15 and 20 is 5.

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