What set of numbers does -12 belong to?

Answer 1

-12 belongs to at least the sets of all numbers, of integers and negative integers, of rational numbers and negative rational numbers, and all negative numbers.

Answer 2

Any set that contains -1.2, whether finite or infinite.

For example,

the set consisting of only -1.2 ie {-1.2},

the set consisting of -1.2 and 5 = {-1.2,5},

the set consisting of -1.2 and 3 and sqrt(17) = {-1.2,3,sqrt(17)}, and so on.

Answer 3

What sets do 8.5 belong to