Four friends - Alex, Brian, Charlie, and David - have different favorite colors: Red, Blue, Green, and Yellow. Alex does not like Red or Blue. Brian's favorite color is not Green. Charlie likes Blue. What is David's favorite color?
In a group of five friends, A, B, C, D, and E, each has a different favorite color: Red, Blue, Green, Yellow, and Black. A does not like Blue or Green. B likes Red. C does not like Yellow. D likes Black. What is E's favorite color?
Five students, A, B, C, D, and E, scored different marks in an exam. A scored more than B but less than C. D scored less than E but more than A. Who scored the highest marks?