Respuestas

2012-06-13T01:16:08+02:00

va de 3 en 3 ,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,117 y 120

 

espero que te alla ayudado

2012-06-13T02:49:22+02:00

3+6+9+12+....+120

factorizar:

3(1+2+3+......+40)

3(40.41/2)

3(820)=2460

Espero que te sirva..