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Number System | Natural Numbers/Whole Numbers/Integers/Composite numbers/Prime Numbers/Odd/Even numb Video Lecture - Class 9

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FAQs on Number System - Natural Numbers/Whole Numbers/Integers/Composite numbers/Prime Numbers/Odd/Even numb Video Lecture - Class 9

1. What are natural numbers?
Ans. Natural numbers are a set of positive integers starting from 1 and extending indefinitely. They are used to count or label objects. In other words, natural numbers are the counting numbers.
2. What are whole numbers?
Ans. Whole numbers are a set of numbers that include all the natural numbers along with zero (0). They do not include any negative numbers. Whole numbers are used to represent quantities or values that cannot be divided into fractions or decimals.
3. What are integers?
Ans. Integers are a set of numbers that include all the whole numbers along with their negative counterparts. In other words, integers include both positive and negative whole numbers, including zero. Integers are used to represent quantities that can be positive, negative, or zero.
4. What are composite numbers?
Ans. Composite numbers are natural numbers greater than 1 that have more than two factors. In other words, they can be divided evenly by numbers other than 1 and themselves. For example, 4, 6, 8, and 9 are composite numbers.
5. What are prime numbers?
Ans. Prime numbers are natural numbers greater than 1 that have exactly two factors - 1 and themselves. In other words, they cannot be divided evenly by any other number. For example, 2, 3, 5, and 7 are prime numbers.
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