Fun Math Coloring Worksheets, Mystery Pictures & Color-by ... Fun Math Coloring Worksheets, Mystery Pictures & Color-by-Number. July 27, 2016 ... GCF, LCD, LCM Coloring Worksheets. This is a collection of our task cards and coloring sheets on solving for the greatest common factor (GCF) and least common multiple (LCM) of two numbers, and the least common denominator (LCD) of two fractions. ...