When a number is multiplied three times by itself, it becomes a perfect cube. \\begin{array}{lll} \ ext { Number }(\\mathbf{x}) & \\multicolumn{1}{l}{\\begin{array}{l} \ ext { Multiplied Three times by } \\\\ \ ext { itself } \\end{array}} & \ ext { Cubes }\\left(\\mathbf{x}^3\\right) \\\\ \\hline 25 & 25 \ imes 25 \ imes 25 & 15625 \\end{array} So the cube of 25 is 15625.