There are 15 composite numbers greater than 50 but less than 70
30
One: 97
49
99
45 of them.
Nineteen. They are: 5101520253035404550556065707580859095
3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
Three of them.
24
Five.
There are 18.
There are 7 composite numbers greater than 20 and less than 30:21, 22, 24, 25, 26, 27, 28
2
there are 4. 11,13,17,19
All of them except for 23 which is a prime number
1260 of them.
74
There are 15 prime numbers and 34 composite numbers because 1 is not considered to be a prime or composite number