Edit: 49 is NOT a Prime number, it is a square, 7^2 = 49. 59, 79 and 89 however are all primer numbers meaning that any of them could be the answer to this question. 59 = 3*10-1 +30 79 = 5*10-1 + 30 89 = 6*10-1 +30 Old and incorrect answer: Answer is 49. 19 {2x10-1} +30=49 49 is prime
41
73 7-3 = 4 73 is prime and 37 is prime.
97
97The only candidates are 64, 75, 86, and 97. 97 is the only prime in that group.
6849 and 0213
It is 77.It is 77.It is 77.It is 77.
41
The only prime number less than 3 is 2.
The only prime number less than 3 is 2.
73
73 7-3 = 4 73 is prime and 37 is prime.
A single digit prime number
7
29
87 is the only 2-digit number that is 6 greater and 13 less than a square, but it is not prime.
It is 23
54