In the number of columns 1, - 3,5, - 7,9, - 11 ~ at least take out a few numbers to make the sum equal to 0 I'm in urgent need. I hope those who can answer | Math enthusiast | Mathematical art

In the number of columns 1, - 3,5, - 7,9, - 11 ~ at least take out a few numbers to make the sum equal to 0 I'm in urgent need. I hope those who can answer

Take at least four numbers to make the sum equal to 0
For example: - 3,5,9, - 11
Because one obviously can't do it, so can two. There are two cases of three: two positive and one negative or two negative and one positive can't be zero

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