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10 equal sacks (Posted on 2002-05-08)

You have 20 pounds of flour that must be distributed into 10 sacks of 2 pounds each.

At your disposal is a scale, and two weights: a 5 pound one and a 9 pound one.

How can you complete this job in only 9 weighings?

See The Solution Submitted by levik

Rating: 2.8571 (7 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

My Solution Revised

| Comment 3 of 7 |

An revision that simplifies my solution. You do not need to readjust the weights. Leave the 18 lbs on one side of the scale. After weighing out 2 lbs in a sack, just put it back on the scale with the unweighed flour.

Posted by Dan on 2002-05-09 09:23:57

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