23 and 29
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
Every even number is evenly divisible by 2.
2 21 3 31 4 41 4 41...
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.