Question

Descubra a soma dos termos 2+4+6+8+...+32+34+36.

Answer 1

2+4+6+8+10+12+14+16+18+20+22+24+26
\ / \ / \ / \ / \ / \ / \
6 + 14 + 22 + 30 + 38 + 46

\ 42 / \ 84 /
\ 126 /
+28+30+32+34+36. / \ / \ /
54 + 62 + 70
\ /
186=126+186=312