Yes, because if it had zero as the final digit, it'd be divisible by 2 and 5, and thus not prime.
23
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
Yes, they are.
Yes that is correct
The first two-digit prime number is 11.
23
9797 is the largest two digit prime number.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
Yes that is correct
Yes, they are.
The first 'three digit' Prime Number is 101.
You can check this in any list of prime numbers. The answer is yes. Note that this doesn't apply to larger numbers.
Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
11 is the smallest two-digit prime number.
997 is the biggest 3 digit prime number.
The first two-digit prime number is 11.
The largest single digit prime number is 7.