Question

What is the greatest common factor of `8` and `18`?

Answer 1

2

Explanation:

Factors of 8- 1,`color(red)2`,4
Factors of 18-1,`color(red)2`,3,6,9

Answer 2

`GCF(8,18)=color(red)2`

Explanation:

Although it wasn't asked for I included the Least Common Multiple (LCM) as well as the Greatest Common Factor (GCF) since they have related methods of derivation.

PrimeFactors:
#{: (8,=,color(white)("xx")2,xx2,xx2,,,), (ul(18),=,ul(color(white)("xx")2),ul(color(white)(xx2)),ul(color(white)(xx2)),ul(xx3),ul(xx3),), (GCF,=,color(white)("xx")color(red)2,,,,,), (LCM,=,color(white)("xx")color(blue)2,color(blue)(xx2),color(blue)(xx2),color(blue)(xx3),color(blue)(xx3),=color(blue)72) :}#