There are 21 two-digit prime numbers.
There are 17 such numbers.
24 of them.
1. being 5. any other number ending in a 5 is divisable by 5
45
There are 21 two-digit prime numbers.
There are 17 such numbers.
17, 37, 47, 67, 97
An on-line prime number chart ended at 10007. There are many more charts available for download. So the answer is that there are many five digit prime numbers.
there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100
Ten.
24 of them.
300
1. being 5. any other number ending in a 5 is divisable by 5
4: 2, 3, 5 and 7. 1 is not a prime.
90
none