4,8,12,16,20,24,28,32,36
4 and 18
That's not really how that works. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36 Any time you're looking for the least or greatest common, you're comparing one set of factors to at least one other to see if they have anything in common.
49
No, because it is dividable by more than 1 and 824. You can also divide it by 2, 4, and other numbers.
24 + 36
36
9 and 4; 36 and 1; 36 and 36; 18 and 4 ...
36/9 = 4 36 - 9 = 27 The two numbers are therefore 9 and 36.
51
-32
115 remainder 4
Yes, 9,024 divided by 4 is 2,256.