Whats1 plus 1 plus 2 plus 2 plus 3 plus 3 plus 4 plus 4 plus 5 plus 5 plus 6 plus 6 plus 7 plus 7 plus 8 plus 8 plus 9 plus 9 plus 10 plus 10 plus 11 plus 11 plus 12 plus 12 plus 13 plus 13 plus 14 pl?

Answer 1

2(1+2+3+4+5+6+7+8+9+10+11+12+13+14) is the same as the question of the next part is supposed to be 14 plus 14. the answer is simply 1+2 and so on until 14, and then multiply by 2. The answer is 210.