Respuestas

2013-11-07T00:04:12+01:00
3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 
4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40
5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

Esos son, tan sencillo como aplicar las tablas de multiplicar