-57
30
13 26
the first 5 multiplies of 5 are 5, 10, 15, 20, 25
5 10 15 20 25 30
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
If they have a Prime multiple in common, then they are not co-prime numbers.Hence no 2 multiples of 13 exists to satisfy this condition.
13