What variable data type should you use if you want to specify numeric values for mathematical operations?

• A. Number
• B. String
• C. Boolean
• D. Date

Answer: (A)

Using a numeric data type is essential when you plan to perform mathematical operations. The Number type is designed for arithmetic with operators like +, -, *, and /, so it stores values in a form that makes these calculations reliable and predictable. If you store numeric values as strings, you can run into unintended results (for example, "2" + "3" can concatenate to "23" instead of producing 5). Booleans represent true/false and aren’t meaningful for math without converting, and dates are for points in time (you’d typically convert them to numbers like timestamps if you need to compute differences). So, for numeric values used in calculations, the numeric type is the correct choice.