Answer :
[tex]Greatest\ common\ factor\ is\ the\ highest\ number\ by\ witch\ 142\ and\ 148\\can\ be\ divided\\\\
142:2\\
71:71\\\\
148:2\\
74:2\\
37:37\\\\GCF=2\\\\Greatest\ common\ factor\ of\ 142\ and\ 148\ is\ equal\ to\ 2.[/tex]