1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20?
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20.
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20.
En resumen
1 + 2 = 3 + 3 = 6 + 4 = 10 + 5 = 15 + 6 = 21 + 7 = 28 + 8 = 36 + 9 = 45 + 10 = 55 + 11 = 66 + 12 = 78 + 13 = 91 + 14 = 105 + 15 = 120 + 16 = 136 + 17 = 153 + 18 = 171 + 19 = 190 + 20 = 210.
1 + 2 = 3 + 3 = 6 + 4 = 10 + 5 = 15 + 6 = 21 + 7 = 28 + 8 = 36 + 9 = 45 + 10 = 55 + 11 = 66 + 12 = 78 + 13 = 91 + 14 = 105 + 15 = 120 + 16 = 136 + 17 = 153 + 18 = 171 + 19 = 190 + 20 = 210.