What is the smallest subset that -24 belongs to? a) natural numbers
b) integers
c) rational numbers
d) irrational numbers

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

72 is the mode because it shows up the most number of times