You are interviewing two job candidates in a row. First of them admits to you that he has heard how second candidate admitted to him in the waiting room that she is a liar. Can this first candidate be trusted?
Assume that everyone in this story is either chronic liar or truthteller.
(from the Mensa Genius Quiz Book 2)
See TheMathMom presentation:
Popular Puzzles
-
This is an easy puzzle that you all are welcome to share with your kids and friends: Put addition signs between the digits 88888888 to get ...
-
This puzzle arrived via email from one of the fans. Can you move just one match to make this statement correct? There is more than one sol... -
Here is a number magic trick that came to me via mail. All of you, math detectives, are invited to unveil its magic with your logic. Tak... -
This came in a magic trick box that our daughter picked for her birthday. Exhausted from all the Bar Mitzvah preparations for her older b... -
This came from my son who got it from someone else at school. I solved it quickly and texted him the answer just as I was getting into ... -
Magic squares are tables of numbers where sums of every row, every column and both diagonals produce the same number. No, they were not in... -
My daughter's school teacher is showing kids some number mysticism. She told them to take any 3 digit number, e.g.793. Scramble its digi... -
We are done with the winter Olympics and now are looking forward to the Oscar's entertainment. As we saw in the previous puzzle , t... -
I found this puzzle in a tiny but mighty pocket puzzle book named Optical Illusions. Suppose the yellow billiard ball strikes the bumper a... -
You have 42 parrots and 7 cages of various sizes. Lock all the parrots inside the cages so that no cage is empty and each cage contains an ...
2 comments:
He is lying.
If the second candidate is a liar and admits to that then she is not a liar: False statement.
If the second candidate is a true teller and admits to being a liar. Then she is not a true teller: False statement
If the first candidate is a true teller and presenting this false statement: False statement.
If the first candidate is a liar and presenting this false statement : true statement.
So the first candidate is a liar.
Alin, very impressive analytical reasoning!
In fact you are so good that I would like to ask from you a big favor. Can you give the rest of the readers, the "simple mortals" or "logic geniuses who are just too busy" a small window to try to answer as well. May I ask you to wait one day before answering, and then submit your solution?
The more people will get to try our Puzzle Marathon, the more interesting the race will be. Thank you for understanding!
Post a Comment
Note: Only a member of this blog may post a comment.