The number - 3 can be classified as which of the following?

OA) an integer

OB) a rational number

OC) a real number

OD) all of the above

-3 is an integer, rational number and real number, so correct option id D) that is all of the above.

Explanation:

Integer is all natural number that a 1, 2, 3, 4 ... And zero and negative of natural numbers like - 1, - 2, - 3, - 4 ... So - 3 is an integer.

Rational number is the number which can be represented in the form of p/q where p and q are integers and q ≠ 0. As - 3 can be represented as (-3) / 1. hence - 3 is also a rational number.

Real number is all number which can be represented on number line. All integers and rational numbers are real numbers. so - 3 is also a real number.

Hence as - 3 is an integer, rational number and real number, so correct option id D) that is all of the above.