Programing contest
In a programing contest of three rounds 1490 people entered. Half of the total contestants where eliminated in the first round. In the second round where eliminated 740 contestants leaving for round three Aby, Buby, Caty, Jessy and Fluffy. They each had a statement which is true or false.
Aby said "I am first"
Buby said "Aby isn't first"
Caty said "Buby isn't telling the truth"
Jessy said "Buby is last"
Fluffy said "I am second"
Who is lying, if exactly one of the contestants isn't telling the truth?
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1 solution
It is clear that either Aby or Buby are telling a lie because they say the opposite.
If Aby is telling the lie then Buby's and Caty's statements will be in a conflict.
If Buby is telling the lie no statements are in a conflict.
Answer Buby!