What is Prime Number,its definition and numbers of prime numbers exist from 1 to 100- KUMUD MATHS

                          PRIME NUMBER

Q1. What is Prime Number?

=All those numbers are prime numbers that are only divisible by itself and 1. On first look, your mind will say every number is divisible by itself and 1 so, every number is a prime number, the answer is a big no because numbers should not be divided by any number except 1 and itself. 

Ex- 2 - It is the first prime number in the number system because it is only divisible by 1 and itself and no any other number. 

Note- #  2 is the first even prime number in the number system.

          

          # 2 is also the smallest first even prime number.

          # 2 is also the first smallest prime number.

      

Set of examples- 

 2 - Yes prime number. It is only divisible by 1,2 i.e., two factors. 

 3- Yes prime number. It is only divisible by 1,3 i.e., two factors.

 4- It  Is not a prime number because it is divisible by three numbers i.e., 1,2,3, hence it is not a prime number.

5- It is also a prime number because it is only divisible by 1 and itself i.e., only two factors.

6- It is not a prime number because it has four factors (divisible by i.e., 1,2,3,6. 

7- It is a prime number because it has only divisible/factors by itself and 1.

Q2. Write down all prime numbers between 1 to 50?

= In the first question, I have described what is a prime number and how we identify any number could be a prime number or not by putting some examples before you in this question I am writing here all prime numbers lying between 1 to 50.

 2, 3,5,7,11,13,17,19,23,29,31,37,41,43,47.

Q3. How many prime numbers exist between 1 to 50?

 = There are 15 prime numbers exist between 1 to 50, which are written above.

Q4. What is the smallest prime number?

 = In the number system, 2 is the smallest prime number.

Q5. What is the smallest even prime number?

 = 2 is the smallest even prime number in the number system.

Q6. How many even prime numbers exist between 1 to 50?

= Only one even prime number exist which is '2' between 1 to 50.

Q7. Is '1' is a prime number?

= No 1 is not a prime number.

 

Q8. How many prime numbers exist between 1 to 100?

= There are a total of 25 prime numbers present between 1 to 100.

Q9. Write down all prime numbers from 1 to 100.

= 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97.

Q10.How many even prime numbers exist between 1 to 100?

= only one even prime number exists between 1 to 100.

Do you know what is twin prime numbers in the number system in math? 

just click here to read all full details of twin prime numbers- TWIN PRIME NUMBERS