RI Class of 63-65

Monday, November 20, 2006

What day is it?

At a risk of turning this blog into a puzzles blog, here is one which I found quite interesting -

Consider two persons, A and B. One tells the truth on Monday, Tuesday and Wednesday while the other tells the truth on Thursday Friday and Saturday. They both tell the truth on Sunday.

A said, “Today is not Sunday”
B said, “Today is not Monday”

Which one is A and what day is it?

posted by KMK at 9:57 pm

2 Comments:

  • I must honestly admit I did not even think that there could be more than one solution! Yes, the word ONLY was implicitly assumed and should have been included.

    By Blogger KMK, at 21 November, 2006  

  • Solution:
    Obviously it was not a Sunday as both of them tells the truth on that day of the week.

    Since it was not a Sunday the first person was telling the truth and the second person has to be lying. It must therefore be a Monday.

    I thought the puzzle was challenging until I gave it to daughter. She solved it in less than a couple of minutes, making me feel both proud and humbled. But she is a statistician.

    Anyone enjoying puzzles can go to

    http://www.stetson.edu/~efriedma/puzzle.html

    Kin Mun

    By Blogger KMK, at 01 December, 2006  

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