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प्रश्न
What are prime numbers? Give ten examples.
उत्तर
Prime number: A number is called a prime number if it has only two factors, namely 1 and itself.
Examples: 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29 are prime numbers.
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संबंधित प्रश्न
What are composite numbers? Can a composite number be odd? If yes, write the smallest odd composite number.
Give examples of five pairs of co-primes.
Express the following odd number as the sum of three odd prime number:
35
Show that the following pairs are co-primes:
343, 432
Which of the following is a composite number?
Fill in the blank.
Two perfect numbers are ________ and _______
Write 'T' for true and 'F' for false for the following statement.
The HCF of two given numbers is always a factor is their LCM.
Express the following number as the sum of three odd primes:
21
All prime numbers are odd.
2 is the only even prime number.
