There are 19 numbers in the range, of which 23, 29, 31 and 37 are prime...
Five.
There are 18.
Six
Just count them - there are not THAT many of them.
There are 6 odd numbers that are greater than 6 but less than 19. The odd numbers between 6 and 19 are 7, 9, 11, 13, 15, and 17.
The prime numbers that are greater than 80 and less than 100 are 83, 89, and 97.
3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
There are 15 composite numbers greater than 50 but less than 70
Infinitely many.
Three of them.
109 whole numbers greater than 9 and less than 999 are multiples of 9
24 of them.
24
25
There are 499 whole numbers that fit those conditions.
23 29.
One: 97