which number is composite 15, 17. 19. 23.

15

are you right

Yes, 15 is a composite number.

is 27 a multiple of 9

Yes, 27 is a multiple of 9 because 9 multiplied by 3 equals 27.

is 9 a factor of 27

Yes, 9 is a factor of 27 because 27 divided by 9 equals 3.

which type of numeber is 27 prime . composite. neither