S=11+13+15+........+211 211-11=200 200÷2=100 de termeni
S=211+209+207+....+11
..............................................
2S=222+222+222+....+222
2S=222*100=22200
S=22200÷2
S=11100
S=6+12+18+.......+186 186-6=180 180÷2=90 de termeni
S=186+180+174+...+6
..................................
2S192+192+192+....+192
2S=192*90
2S=17.280
S=17.280÷2
S=8640