4

Part of 2002 Chile National Olympiad

Problems(1)

1+-2+-3+-...+-2002 =0 ? Chile 2002 L2 P4

Source:

All naturals from

1

2002

are placed in a row. Can the signs:

+

-

be placed between each consecutive pair of them so that the corresponding algebraic sum is

0

algebrachilean NMO