The number 32 falls into what mathematical classification?

a Natural number only
b Natural number and rational number only
c Natural number and whole number only
d Natural number, whole number, rational number, and integer

d Natural number, whole number, rational number, and integer

The number 32 falls into mathematical classifications b, c, and d. It is considered a natural number because it is a positive integer. It is also a whole number because it does not have a fractional or decimal part. Furthermore, 32 is a rational number because it can be expressed as a fraction, in this case, 32/1. Additionally, 32 is an integer because it belongs to the set of whole numbers, including negative numbers and zero.