1260 of them.
There are 1260 composite numbers from 1 to 1500.
They are 239 prime numbers less than 1500.
74
There are 15 prime numbers and 34 composite numbers because 1 is not considered to be a prime or composite number
There are 15 composite numbers greater than 50 but less than 70
3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
There are 18 that are less than 30.
The composite numbers that are between 1 and 20 inclusive are: 4 6 8 9 10 12 14 15 16 18 20 This is a total of eleven composite numbers equal to 20 and below.
Three of them.
49 of them.
24