All of them, except 101, 103, 107, 109, 113, 127, 131, 137, 139,
149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, and 199.
No, a nonprime number multiplied by a nonprime number will be a nonprime number.
810/30=27
2310 = 231 X 10 Break down into factors. = 3 X 77 X 5 X 2 Break nonprime numbers into further factors. = 2 x 3 X 5 X 7 X 11 When all factors are prime, we are done!
irrational numbers odd numbers even numbers whole numbers prime numbers composite numbers counting numbers
There are no prime numbers that are square numbers