Number 17 is but 15 isn't as 5x3 isn't a prime number
It is 13: 2, 3, 5, 7, 11, 13, 17 . . .
17
The whole number between 13 and 17 is 15
17
If you mean: 12 13 15 17 27 and 29 then the prime numbers are 13 17 and 29
13
Even number bigger than two are never prime so cross them out, leaving11,13,15,17,19Any number ending in 5 is divisible by 5 and so can not be prime,This leaves 11,13,17,19 which all could be prime and actually are.
17.
13
well prime numbers are 1 2 3 5 7 11 13 15 17
It is 17.