If I throw 1000 10-centimeter-long needles on to a tiled floor, where each tile is a 10 cm x 30 cm rectangle, approximately how many needles will end up lying across a crack?

You may assume that the widths of both the needles and the cracks are negligible.

(In reply to solution by Charlie)

Nice work, Charlie.  I think you've said it all.

Posted by Steve Herman on 2005-01-20 12:41:42