Number System | Types of numbers | Kautilya Management Sutra | Dr. Gaurav Sethia

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Natural numbers- natural numbers are those numbers that are used for counting and ordering
Counting numbers- counting numbers are those numbers which start from 0 and continue till infinity.

Whole numbers- whole numbers are all those counting numbers along with zero.
All natural numbers are whole numbers but all whole numbers are not natural numbers.
Integers- integers are of three types- positive, neutral and negative.

Integers are referred to as all counting numbers, all negative counting numbers, and zero. Integers are always complete numbers; they are not in fractions or decimals.

Prime numbers- prime numbers are those numbers which have exactly two factors, i.e. 1 and the number itself

2 is the first prime number. Universally, there is only one even prime number i.e. 2.
Composite numbers- composite numbers are those natural numbers except one and the
prime numbers. They have at least 3 factors.

4 is the first composite number.
Coprime numbers- Coprime numbers are those sets of numbers which do not have any common factor, i.e. their HCF is 1.

Decimals-
Terminating decimals
Non terminating decimals-
Recurring decimals
Pure recurring
Mixed recurring
Non recurring non terminating decimals

Complex numbers- In mathematics a complex number is a number that can be expressed in the form of be expressed in the form of a + bi, where a and b are real numbers, and i is the symbol called the imaginary unit, and satisfying the equation i^2 = -1

Rational numbers- rational numbers include all integers, fractions, and terminating or recurring decimals.

Irrational numbers- Irrational numbers are all those numbers which are not rational numbers. In other words any rational number is a number which cannot be expressed as a/b where a and b are integers.

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