Notice the number of angles when you write/display the numbers (1-9) with straight lines.
For example:
Two (2) has two angles when written/displayed as (Z).
Three (3) has three angles when written like the Greek letter "Sigma".
Six (6) has six angles and Eight (8) has eight angles (please see the display in digital watches or calculators)
Only Zero (0) is circular- or ellipse- shaped which has no angle.
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All numbers are not natural numbers.Natural numbers are 1,2,3,4,5....
Real numbers are all numbers which do not contain "i", when "i" represents the square root of -1. All numbers which do contain "i" are "imaginary numbers" and are not real numbers. This means that all numbers you'd ordinarily use are real numbers - all the counting numbers (integers) and all decimals are real numbers. So in answer to your question, all the real numbers that are not whole numbers are all the decimal numbers - including irrational decimals such as pi.
-- All natural numbers. -- All integers. -- All real numbers. -- All numbers less than 32.1 . -- All positive whole numbers. -- All numbers greater than 23.9 . -- All numbers containing the digit ' 2 '. -- All even numbers (multiples of 2). -- All multiples of 4 .
All rational numbers are not whole numbers, as rational numbers can include fractions.