16 - 1, 2, 4, 8, 16 - composite
19 - 1 & 19 - prime
40 - 1, 2 ,4 , 5, 8, 10, 20, 40 - composite
32 - 1, 2, 4, 8, 16, 32 - composite
29 - 1 & 29 - prime
12 & 8 - gcf : 4 - lcm : 24
6 & 9 - gcf : 3 - lcm : 18
30 & 40 - gcf : 10 - lcm - 120
16 & 24 - gcf : 8 - lcm : 48
prime - a number with no more other factors other than one and the number itself
composite - a number with two or more factors
