Respuesta :
The greatest common factor would have to be 30
60/30=2
90/30=3
60/30=2
90/30=3
[tex]Greatest\ common\ factor\ is\ the\ highest\ number\ by\ witch\ 60\ and\ 90\\can\ be\ divided\\\\
60:2\\
30:2\\15:3\\5:5\\\\
90:2\\
45:3\\
15:3\\5:5\\\\GCF=2*3*5=30\\\\Greatest\ common\ factor\ of\ 60\ and\ 90\ is\ equal\ to\ 30
[/tex]