[tex]Greatest\ common\ factor\ is\ the\ highest\ number\ by\ which\ 50, \\ 120 and \ 80\ can\ be\ divided\\\\ 50:2\\ 25:5\\ 5:5\\\\ 120:2\\ 60:2\\ 30:2\\ 15:3\\ 5:5\\\\ 80:2\\ 40:2\\ 20:2\\ 10:2\\ 5:5
\\\\GCF=2*5=10\\\\Greatest\ common\ factor\ of\ 50,120\ and\ 80 \ is\ equal\ to\ 10.
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