Is 12 an irrational number

Answer 1

No. It is rational. It is a counting number - an integer. All integers are rational. So are all fractions that are written as the ratio of two integers. The fractions 1/2, 3/7, 22/67 and 99896/44444786 are rational. Note that the integers are all the counting numbers, both positive and negative, and zero, too. The list looks like this: ..., -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, ... A rational number is one that can be written as the ratio of one whole number to another whole number, or, if you like a fraction with one whole number over another whole number. Every decimal number is rational if 1) it is not infinite, or 2) it repeats in some way, like 0.33333333... which is 1/3 as we know. Additionally, every mixed number, that is, a whole number and a fraction, is rational. The numbers 6 2/3 and 53 4/9 are both mixed numbers, and, as stated, are rational, like all their other "friends" that are mixed numbers.

Answer 2

No, it is a rational number because 1.2 can be expressed as a fraction in the form of 6/5

Answer 3

All integers, whether positive or negative, are rational numbers.