Four pairs of lords and ladies all went to a royal ball. Each lord was wearing one color (yellow, red, blue, or green) and each lady was also wearing one of these colors. No couple was wearing the same color, so it was hard to tell who was married to who.

Using the clues, can you determine which lord is with which lady?

1. The Green Lord is with the Red Lady, if and only if the Yellow Lord is with the Blue Lady.

2. The Yellow Lord is with the Red Lady if and only if the Green Lord is with the Yellow Lady

3. The Red Lord is with the Blue Lady, if and only if the Green Lord is with the Red Lady.

here's my chart

step one

Green lord-Red lady      Yellow lord-Blue lady

Blue lord-Green lady     Red lord-Yellow lady

step two

Yellow lord-Red lady      Green lord-Yellow lady

Blue lord-Green lady      Red lord-Blue lady

step three=solution

Red lord came to the ball with Blue lady         

Green lord came to the ball with Red lady

Therefore

Blue lord came to the ball withYellow lady     

Yellow lord came to the ball with Green lady

while reading i realized that the blue lord and the green lady were never mentioned so i thought that they were together the whole time that is until yellow lord was left alone with yellow lady but no two colors the same can be paired together so blue had to be with yellow so that yellow could be with green to make the statement true at the end

Posted by mari on 2004-07-19 23:20:00