29
Well, let's see ... If it's between 20 and 30, then its ten digit has to be 2. And if its ten digit is 2, then its one digit has to be 9. So the real question we have to answer is: "Is 29 a prime number ?" The answer is: Yes. So that must be it.
Greatest 2 digit prime number is 97. Lease 2 digit prime number is 11.
The only other single-digit number higher than 5 which is a prime number is 7 - 9 is equal to 3 squared, and is thus not a prime number.
Any prime number greater than 10 is an odd number but cannot end in 5 as this makes it divisible by 5. Therefore the ones digit of any prime number greater than 10 must be 1, 3, 7 or 9.
23
89 is a prime number between 70 and 100 that has the ones digit one greater than the tens digit.
Well, let's see ... If it's between 20 and 30, then its ten digit has to be 2. And if its ten digit is 2, then its one digit has to be 9. So the real question we have to answer is: "Is 29 a prime number ?" The answer is: Yes. So that must be it.
16
The only other single-digit number higher than 5 which is a prime number is 7 - 9 is equal to 3 squared, and is thus not a prime number.
Greatest 2 digit Prime number is 97. Lease 2 digit prime number is 11.
Greatest 2 digit prime number is 97. Lease 2 digit prime number is 11.
Any prime number greater than 10 is an odd number but cannot end in 5 as this makes it divisible by 5. Therefore the ones digit of any prime number greater than 10 must be 1, 3, 7 or 9.
Probably 73.
11 is the smallest 2-digit prime number and 97 is the greatest 2 digit prime number, so their difference is 86
43
3, 5, or 7
There can only be one largest two-digit prime number.