Question

write all the factors of 19 and decide whether 19 is a prime number or composite nunber​

Answer 1

Answer:

Yes, 19 is a prime number. The number 19 is divisible only by 1 and the number itself. For a number to be classified as a prime number, it should have exactly two factors. Since 19 has exactly two factors, i.e. 1 and 19, it is a prime number.

Answer 2

Answer:

• All the factors of 19 are 1 and 19 .
• 19 is a Prime number .

Step-by-step explanation:

Step 1:

• If we try to factorize the number 19 we get 1 and 19 itself.
• Since 1 divides all the real numbers and 19 divides itself.

So   19 = 1 x 19

Step 2 :

Prime Numbers : If given any real numbers does not have any factor other than 1 or itself then that number is called prime number,

Example : 2 , 3, 5 ,7 ,11 etc.

Composite Numbers : If given any real number have at least one factor other then 1 and itself then that real number is called composite number.

Example : 6 , 10 ,15

Here in the question given real number is 19 which does not has any factor other then 1 and itself 19 so we can say that 19 is a prime number.

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