Question

Qual o MMC de 9, 15 e 21?

Answer 1

9,15,21|3   |
3, 5,7   |3   |
1, 5,7   |5   |
1,1,7    |7   |
1,1,1          |
_________| 3X3X5X7= 315

Answer 2

15: {0 , 15 , 30 , 45 , 60 , 75 , 90, ...}
9: { 0 , 9 ,18 , 27 ,36, 45 , 54 ,63,...}
21:{0, 21, 42, 63, 84, 105 , 126 , 147,...}