2 and 3 is the only pair.
2 and 3 No other pair.
The numbers are 13 and 41. And you do not need to know that they are prime in order to find the answer. The sum (54) and difference (28) provide all the necessary information.
Square numbers can't be prime. They have too many factors.
The prime factorization for 18 is: 2 x 9 2 x 3 x 3, so the two prime numbers that give you 18 are 2 and 3.
5 and 3 are two prime numbers which on adding give 8.
The prime numbers 2 and 3.
2 and 3 No other pair.
Two and three.
The numbers are 13 and 41. And you do not need to know that they are prime in order to find the answer. The sum (54) and difference (28) provide all the necessary information.
5 and 3 are two numbers less than 7, whose difference is 2.
18 prime numbers
Greater than one, numbers are either composite or prime, never both.
Square numbers can't be prime. They have too many factors.
The list is far too long to list here (millions of them); a search on "list of prime numbers" can quickly give you the desired prime numbers.
2 and 3
The prime factorization for 18 is: 2 x 9 2 x 3 x 3, so the two prime numbers that give you 18 are 2 and 3.
some prime numbers with a difference of 2: (3, 50, (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73), (101, 103), (107, 109), (137, 139), (149, 151), (179, 181), ...