Determine numeric characteristics for
Counting numbers > 0: 1,2,3,4,5,...
Since is not both positive and a counting number, is not a natural number
Whole Numbers are positive numbers
They include 0
They have no decimal or fractional parts
Since >= 0 and it is an integer, is a whole number
Integers have no fractions or decimals
-5,-4,-3,-2,-1,0,1,2,3,4,5,...
is an integer
Rationals = a/b
where a and b are integers<
and b ≠ 0.
They do not form a ratio between two integers
They are not an imaginary number.
Test for square root of a negative
Since is not the square root of a negative number, it is not imaginary