31/61 is a simplified fraction because 31 and 61 are both prime numbers.
13 prime 63 composite 61 prime 31 prime Well the question should have been either, Which one of these numbers is not a composite number? Or, Which one of these numbers is not a prime number?
31 37 41 43 47 53 59 61.
100
61 is already prime.
31/61 is a simplified fraction because 31 and 61 are both prime numbers.
13 prime 63 composite 61 prime 31 prime Well the question should have been either, Which one of these numbers is not a composite number? Or, Which one of these numbers is not a prime number?
All are prime numbers except 1. 1 is neither prime nor composite.
The prime numbers from 31 to 80 are 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, and 79.
They are 31 plus 61 = 92
31 and 61 have no common factor, so 31/61 can't get any simpler than it already is.
31 37 41 43 47 53 59 61.
61 is prime.
The numbers 31, 37, 41, 43, 47, 53, 59 and 61 are prime (including the boundaries).
100
The prime numbers from 1 to 61 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, and 61.
61 is already prime.