Respuesta :

GCF stands for the greatest common factor.

Notice that,

[tex]\begin{gathered} 24=6\cdot4=3\cdot2^3=3\cdot2\cdot2^2 \\ \text{and} \\ 28=7\cdot4=7\cdot2^2 \end{gathered}[/tex]

Therefore, the GCF of 24 and 28 is 4.