Answers to Contest Center puzzles, riddles and brainteasers

Riddle Answers
The Contest Center
59 DeGarmo Hills Road
Wappingers Falls, NY 12590
Cups
       Here is one way: fill the 9-gill cup, and pour it off into the 4-gill cup until it is full. This leaves 5 gills. Empty the 4-gill cup and fill it again from the 9-gill cup. This leaves 1 gill in the 9-gill cup. Empty the 4-gill cup and pour in the 1 gill from the 9-gill cup. Now refill the 9-gill cup and pour it into the 4-gill cup until it is full. This leaves 6 gills in the 9-gill cup.
       Here is a different way: fill the 4-gill cup and pour it into the 9-gill cup. Repeat, so there are 8 gills in the 9-gill cup. Fill the 4-gill cup again and pour it into the 9-gill cup, filling the 9-gill cup and leaving 3 gills in the 4-gill cup. Empty the 9-gill cup and pour in the 3 gills. Now fill the 4-gill cup 2 more times and pour it into the 9-gill cup until it is full. This will leave 2 gills in the 4-gill cup. Empty the 9-gill cup, pour in the 2 gills, and then 4 more gills from the 4-gill cup.




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