Final answer:
The number 120 is classified as a whole, counting, integer, rational, and real number.
Step-by-step explanation:
The number 120 is a whole number as it is an integer without a decimal or fractional component. Whole numbers include all positive integers including zero. Since there is no decimal point or additional digits beyond the whole number, we also classify it as a counting number, which are numbers used to count objects and represent quantity.
Furthermore, 120 is an integer because it is a whole number without any fractional or decimal part. It is also a rational number because it can be expressed as a fraction where both the numerator and the denominator are integers, and the denominator is not zero (in this case, 120/1). Lastly, it is a real number because it can be found on the number line and it is neither an imaginary nor a complex number.
The number 120 would not be classified as irrational, as irrational numbers cannot be expressed as a simple fraction.