my solution for 1.

sailor (Sailor)
1, Mark the heaps from 1 to 10. pick one ball from heap1, two balls from heap2, 3 balls from heap3, ... and 10 balls from heap10. Weight the balls. Minus the result from 55, the final result is the number of heap of 9-pound balls.
2001-4-18 -05:00

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