Question

Write the natural numbers from 1 to 30 . what fraction of them are prime ?​

Answer 1

Answer:

natural number between 1to 30 is 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,23,24,25,26,27,28,29.

prime no.between 1to30are 2,3,5,7,11,13,17,19,23,29

Answer 2

Given:

Write the natural numbers from 1 to 30

To Find:

what fraction of them are prime?​

Solution:

Natural numbers is a number system number consisting from 1 to infinity. They are called counting numbers and doesn't include 0 and negative numbers.

Prime numbers are numbers that have only two factors, one the number itself and the other 1, which means that the number can be divided by only 1 and the number itself.

The natural numbers from 1 to 30 are,

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30

And the prime numbers from 1 to 30 are,

2, 3, 5, 7, 11, 13, 17, 19, 23, 29

which is total of 10 prime numbers.

So the fraction of prime numbers in 30 natural numbers will be,

[tex]Fraction=\frac{10}{30}\\ =\frac{1}{3} [/tex]

Hence, 1/3rd of the natural numbers are prime numbers from 1 to 30.