3, 97
11, 89
17, 83
29, 71
41, 59
47, 53
Greater than one, numbers are either composite or prime, never both.
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.
Actually 2x2x5x7x11 is a prime factorization and on multiplying these numbers we get 1540. Prime factorization of a number is the prime numbers which on multiplying together give that number.
Okay. Give us a pair of numbers.
Six twos.
There 4 pairs of primes that can give a sum 40 in addition. They are (3,37), (11,29), (17,23),(19,21).
To find the pairs of whole numbers that multiply to give 99, we need to determine its factors. The factors of 99 are 1, 3, 9, 11, 33, and 99. The pairs of whole numbers that multiply to 99 are (1, 99), (3, 33), and (9, 11), resulting in a total of 3 distinct pairs.
The prime numbers 2 and 3.
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.
There is no solution. For two numbers to add to an odd total, one of them must be even. If that number is also a prime it must be 2. But if one of the numbers is 2 and the two sum to 289, the other must be 287. But 287 is not a prime and the question required two primes to be added.
The factors of 49 are the numbers that can be multiplied together to give the product 49. The factor pairs of 49 are (1, 49) and (7, 7). This is because 1 x 49 = 49 and 7 x 7 = 49. These are the only pairs of numbers that multiply to give 49, as 49 is a prime number.
Two numbers, like 4 and 9, are considered co-prime if their GCF is 1.