They are the negative integers.
The same way you can tell with integers.
For integers less than 18, 3 and 6.
That happens when only one of the two integers is negative.
1,2,3,4,5,6,7,8,9,10 and 11 Integers are the whole numbers such as one, two, thirteen, a million, etc. I listed the ones which are positive - grater than zero - and smaller than or equal to eleven
-4
The set of negative integers.
is the set of integers greater than or equal to −7 and less than or equal to −1
The integers less than or equal to 2 are: {2, 1, 0, -1, -2, -3, ...}
is the set of integers greater than or equal to −7 and less than or equal to −1 =B−26, 24, 29
There are 80 such integers.
All integer less than or equal to 3 would actually be infinite. It would start at 3 and would keep decreasing in value. 3, 2, 1, 0, -1, -2, and so on forever.
The same way you can tell with integers.
For integers less than 18, 3 and 6.
10, 8, 6, 4, 2, 0 and all the negative even integers.
That happens when only one of the two integers is negative.
All positive integers less than or equal to 39 are whole numbers less than 40.
81