Question

I need to add all numbers from 1to 140.What is my answer and how can I figure it out. Ex: 1+2+3+4+5+6+....+140=?

Answer 1

(141) x (140) /2 = 9870

Answer 2

do you know series equations?

Answer 3

Yes I know series equations

Answer 4

\[\sum_{n=1}^{140}n = \frac{1}{2}(140 * 141)\]

Answer 5

use the one for arithmetic series with a difference of 1, u get agdgdgdwngo's answer

Answer 6

or in any programming language, you can solve it with:

for (i = 1, sum = 0; i <= 140; ++i) {
sum += i;
}

Answer 7

sum = 0
for i in xrange(1,141):
sum += i
print sum

Answer 8

or in MATLAB/TI-89:

sum(n, n, 1, 140)