All the number sets discussed in previous posts i.e., Natural numbers, Whole numbers, Integers and Rational numbers comprise the set of real numbers. So a set of natural/whole/integers numbers can be termed as a sub set of real numbers.
The numbers used to measure exact quantities such as length, area, volume, temperature; GNP, GDP, growth rate, inflation etc. are called as real numbers.
A Set of real numbers includes set of Natural numbers, Whole numbers, Integers and Rational numbers so it can be represented as "R = { N, W, I, Q }"
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