For this type of question, you should search the internet for a list of prime numbers. All the integers that are not prime numbers are composite. In this case, the relevant prime numbers are 101 and 103.
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.
The composite numbers greater than 88 and less than 95 are: 90, 91, 92, 93, 94.(88 and 95 are themselves also composite.)
Composite numbers less than 70 and greater than 60 are 62, 63, 64, 65, 66, 68 and 69.
Composite numbers greater than 20 and less than 30 are 21, 22, 24, 25, 26, 27, 28.
There are 7 composite numbers greater than 20 and less than 30:21, 22, 24, 25, 26, 27, 28
24
Five.
There are 18.
Three of them.
2
18 and 20