13, 26, 39, 52, 65
-57
30
65 = 1 x 65, 5 x 13
13 26
the first 5 multiplies of 5 are 5, 10, 15, 20, 25
5 10 15 20 25 30
Nothing
The first five multiples of 12 are: 12, 24, 36, 48, 60
0
Because 10 is a multiple of 5.2 x 5 = 10
140, 280, 420, 560, 700
-5 and -1