36
39 is not a prime number.
30 has factors of 2,3 and 5
If you mean 29, 39, 59 and 79 then it is 39 that is the only composite number.
It is 39 because it has more than two factors
The number between 39 and 41 is 40. It is the only whole number that falls directly in the middle of these two values.
30
39 is not a prime number.
29 & 59
30 has factors of 2,3 and 5
21 23 27 29 31 37 39
2 x 3 x 5 = 30
2 x 3 x 5 = 30
39 is not a prime number. It can be divided by 3 and 13.
39
39 and 40
It is 39 because it has more than two factors
If you mean 29, 39, 59 and 79 then it is 39 that is the only composite number.