Brain Teasers and Puzzles

Who is Lying?

Amy says Brad is lying.
Brad says Chris is lying.
Chris says both Amy and Brad are lying.

Who is lying? Who is telling the truth?


Only Brad is telling the truth, Amy and Chris are lying.

The way to go about it is to look for a contradiction that proves one person is lying or telling the truth, and then follow the logic from there:

  • If Chris were telling the truth (that both Amy and Brad are lying), Amy would be lying. But this would mean Brad is telling the truth, which contradicts Chris’s statement. So Chris must be lying.
  • If Chris is lying, Brad must be telling the truth.
  • If Brad is telling the truth, Amy must be lying.

19 replies on “Who is Lying?”

I think it is all three or just brad because he is talking some
how to his friends like he wants them to lie and look inocient.

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