5, 7 11, 13 17, 19
(2,3) and (2,5) are the two pairs such that the sum of their elements is a prime number.
There are eight twin prime pairs less than 100 [(3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), and (71, 73)].
1 3 5 7 11 13 17 19
There are 25 prime numbers less than 100
One pair.
5, 7 11, 13 17, 19
Eight pairs.
When their GCF is greater than 1. When they have prime factors in common.
(2,3) and (2,5) are the two pairs such that the sum of their elements is a prime number.
They are: 3, 5 and 7
There are eight twin prime pairs less than 100 [(3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), and (71, 73)].
1 3 5 7 11 13 17 19
25 is a composite number, not a prime. Twin primes are pairs of prime numbers that differ from each other by two. Examples of all twin primes less than 100 are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), and (71, 73).
27 is a composite number, not a prime. Twin primes are pairs of prime numbers that differ from each other by two. Examples of all twin primes less than 100 are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), and (71, 73).
There are 35 prime numbers less than 150.
There are 25 prime numbers less than 100