A Prime number is an integer which is greater than one and which is evenly divisible only by one and itself. A pair of prime numbers consists of two such numbers.
2 and 3 are a pair
No, neither 27 nor 57 are prime numbers.
2 and 5 are one such pair.
No, they are not.
4 and 9
2 and 3 are consecutive numbers that are prime.
If you mean consecutive numbers that are prime? than the answer is 2,3 are consecutive numbers which are prime. except for this pair it is impossible for consecutive numbers to be prime because every second number is multiple of 2
Any pair of consecutive integers is co-prime.
21 is not prime.
Any pair of prime numbers as for example 19 and 23
9 is not a prime. 73 is a prime.
2 and 3 are a pair
Prime numbers are divisible because any numbers that are divisible are prime. If a number isn't divisible, it isn't prime. Prime numbers have to be divisible by at least one pair of numbers to be prime.
No, neither 27 nor 57 are prime numbers.
The numbers are relatively prime, or co-prime.
No.
No, and 57 is not a prime number.