What device is used for mathematical calculations during exams?

• A. Calculator
• B. Ball Pen
• C. Weather Service
• D. Temperature Increase

Answer: (A)

A calculator is the device used for mathematical calculations during exams. It can perform basic operations like addition, subtraction, multiplication, and division quickly and accurately, and many models also handle more advanced functions such as exponents, roots, or trigonometric calculations. This helps you solve problems faster and reduces arithmetic mistakes, which is especially helpful on exams with complex numbers or lengthy calculations. The other options don’t perform calculations: a ball pen is for writing, a weather service forecasts weather, and a temperature increase is a concept, not a computing tool.