Fill + or - for o and make this true: 1 o 1/2 o 1/3 o 1/4 o 1/5 o 1/6 o 1/7 o 1/8 o 1/9 o 1/10 o 1/11 o 1/12 = 0

Question

If possible fill + or - for o and make this true, if not possible then provide the reasoning...

1 o 1/2 o 1/3 o 1/4 o 1/5 o 1/6 o 1/7 o 1/8 o 1/9 o 1/10 o 1/11 o 1/12 = 0

Answer 1

it's not possible to get zero with + or -.
Every next number is less than previous one and all have unique difference, hence the sum of any number groups can't be equal