Prime numbers are positive integers greater than 1 that have only two factors 1 and the number itself. They cannot be divided evenly by any other number. Examples include 2 3 5 7 11 and 13. 2 is the only even prime number all others are odd.
In this chapter students explore prime and composite numbers their characteristics and how to identify them. The chapter covers factors prime factorization divisibility rules and perfect numbers. Students also learn how to find HCF and LCM with practical examples and develop skills in solving related problems.
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Prime numbers are all numbers greater than 1 and have exactly two factors: one and the number itself. All the prime numbers between 1 and 10 are 2, 3, 5, and 7. And since there are four such numbers, the right answer is 4.
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