Practice: Read the following statements about variables below. Decide if each statement is true or false, and write True or False in the column to the right of each statement. A variable is represented by a numerical symbol that is known. Click or tap here to enter text. A variable is a symbol (usually a letter) used to represent a numerical value that is unknown. Click or tap here to enter text. A variable always represents a positive value. Click or tap here to enter text. In some situations, a variable could represent different values. Click or tap here to enter text. Variables are only used in math operations that involve whole numbers. Click or tap here to enter text