Home
Class 6
MATHS
Write down separately the prime and com...

Write down separately the prime and composite numbers less than 20.

Text Solution

AI Generated Solution

To solve the problem of identifying prime and composite numbers less than 20, we will follow these steps: ### Step 1: Understand the Definitions - **Prime Numbers**: A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. This means it can only be divided evenly by 1 and the number itself. - **Composite Numbers**: A composite number is a natural number greater than 1 that is not prime. This means it has more than two positive divisors. ### Step 2: List the Natural Numbers Less Than 20 The natural numbers less than 20 are: ...
Promotional Banner

Topper's Solved these Questions

  • PLAYING WITH NUMBERS

    NCERT|Exercise EXERCISE 3.1|4 Videos

  • PLAYING WITH NUMBERS

    NCERT|Exercise EXERCISE 3.3|6 Videos

  • PLAYING WITH NUMBERS

    NCERT|Exercise EXERCISE 3.7|11 Videos

  • MENSURATION

    NCERT|Exercise EXERCISE 10.2|1 Videos

  • RATIO AND PROPORTION

    NCERT|Exercise SOLVED EXAMPLES|15 Videos

Similar Questions

Explore conceptually related problems

Find the sum of all prime numbers less than 20.

Find the sum of all prime numbers less than 20.

Write all the prime numbers less than 15.

The average of all the prime and composite numbers upto 100 is:

The number of all prime numbers less than 40 is ..

The average of all the prime and composite numbers upto 100 is :

The set of prime numbers less than 99 is :

Write seven consecutive composite numbers less than 100 so that there is no prime number between them.

Write seven consecutive composite numbers less than 100 so that there is no prime number between them.

Counting numbers have fascinated human mind from time immemorial. The first set he seems to have pondered about is the set of natural numbers, N Various subsets of this set were diffined. Note worthy among them are Prime Number :- if a natural number has exactly tow divisors it is called a prime number. Yet another way Simple examples are 2,3,5,7,........... {2,3} in the only set of consective primes. Composite numbers :- A natural number habing more than 2 divisors is called a composite number. Simple examples are 4,6,8,9,10,.......... Note that 1 is neither prime nor composite. Coprime or relatively prime numbers :- A pair of natural numbers is acalled a set of coprime numbers if their highest common factor (HCF) or greatest common divisor (g.c.d.) is 1. For example 8 & 5 are co-prime Note that these two numbers need not be prime. More over 1 is coprime with evert natural numbers. a prime number is coprime with all natural numbers which are not it's multiple. Twin Prime :- A pair of primes is called twin primes if their non-negative difference is '2' For example {3,5} , {5,7}, (11,13} , ......... Based on above difinitions solve that following problems Number of composite numbers less than 15 is