The only twin primes (prime numbers which differ by 2) between 30 and 60 are (41, 43)
They are: 31 and 37
There are 2 primes between 21 and 29 inclusive: 23 & 29.
The products of the primes are the composites.
It is 2:7
31 and 37 are the only two so there are two primes between 30 and 40.
10
21 and 23
21 and 23
2 21 3 31 4 41 4 41...
Every even number is evenly divisible by 2.
11, 13, 17, 19, 23, 29 are the primes between 10 and 30 so the composite numbers are all the others. 12,14,15,16,18,20,21,22,24,25,26,27,28, and 30 are the composite numbers between 10 and 30.