infintate as numbers do not stop, so you can keep adding digits at the end of the negative number.
15 prime numbers are between 0 and 50
100
prime numbers between 0 -100 which are divisible by 7: 7
There are 25 prime numbers between 0 and 100.
25
168
Four.
4 of them.
There are 169.
There are 25.
Eight of them.
There are 10.