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Sort out the natural numbers from the following list- 20, 1555, 63.99, 5/2, 60, −78, 0, −2, −3/2

  • Last Updated : 05 Aug, 2021

In our daily lives, we use numbers. They are frequently referred to as numerals. We can’t count objects, date, time, money, or anything else without numbers. These numerals are sometimes used for measurement and other times for labeling. Numbers have features that allow them to conduct arithmetic operations on them. These figures are expressed both numerically and in words. For example, 3 is written as three, 33 is written as thirty-three, and so on. To learn further, students might practice writing the numbers from 1 to 100 in words.

There are various types of numbers that we learn in Math. Natural and whole numbers, odd and even numbers, rational and irrational numbers, and so on are all examples. In this article, we’ll go through all of the different varieties. Aside from that, the numbers are utilized in a variety of applications, including number series, arithmetic tables, and so on.

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  • A number is an arithmetic value that is used to represent and calculate a quantity. Numbers are represented by numerals, which are written symbols such as “2.”
  • A number system is a method of writing numbers that uses logical digits or symbols to represent them.

Types of Numbers

The number system is a system for categorizing numbers into sets. In math, there are several different types of numbers:



  1. Natural Numbers: Natural numbers are positive integers from 1 to infinity that contain the positive integers 1 to infinity. The set of natural numbers is indicated by the letter “N,” and it consists of N = 1, 2, 3, 4, 5,…………
  2. Whole Numbers: Non-negative integers, often known as whole numbers, are non-negative integers that do not contain any fractional or decimal parts. It is symbolized by the letter “W,” and the set of whole numbers contains W = 0, 1, 2, 3, 4, 5,…………
  3. Integers: Integers are the set of all whole numbers, but they also include a set of negative natural numbers. Integers are represented by the letter “Z,” and the set of integers is Z = -3, -2, -1, 0, 1, 2, 3.
  4. Real Numbers: Real numbers are all positive and negative integers, fractional and decimal numbers that do not contain imaginary values. The letter “R” is used to signify it.
  5. Rational Numbers: Rational numbers are any numbers that may be expressed as a ratio of one number to another number. Any number that may be written in the form of p/q qualifies. The rational number is represented by the symbol “Q.”
  6. Irrational Numbers: Irrational numbers are numbers that cannot be expressed as a ratio of one to another and are denoted by the letter P.
  7. Complex Numbers: Complex numbers (C) are numbers that may be expressed in the form a+bi, where “a” and “b” are real numbers and I is an imaginary number.

Definition of Natural Numbers

Natural numbers are a subset of the number system that encompasses all positive integers from 1 to infinity and are used for counting. It does not contain the number zero. In fact, the numerals 1,2,3,4,…. are often known as counting numbers.

Natural numbers are a subset of real numbers that only include positive integers, such as 1, 2, 3, 4, 5, 6, etc., and exclude zero, fractions, decimals, and negative numbers.

Negative numbers and 0 are not included in natural numbers.

You will discover more about natural numbers in this article, including their definition, comparison to whole numbers, representation on the number line, attributes, and more.

Examples of Natural Numbers

Positive integers (also known as non-negative integers) are included in the natural numbers, and some examples include 1, 2, 3, 4, 5, 6,… Natural numbers, in other terms, are a collection of all whole numbers excluding 0.

103, 42 33, 9999, 101101, etc. are all examples of natural numbers.

For example: What are the first 10 natural numbers?

Since, Natural numbers are a subset of real numbers that only include positive integers, such as 1, 2, 3, 4, 5, 6, etc., and exclude zero, fractions, decimals, and negative numbers.

Therefore, the first 10 Natural Numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.

Problem Statement: Sort out the natural numbers from the following list: 20, 1555, 63.99, 5/2, 60, −78, 0, −2, −3/2 

Solution: 

Since Natural numbers only include positive integers exclude zero, fractions, decimals, and negative numbers.

20, 60, 1555 are the natural numbers from the given list.

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