[LINK] The Albert, Bernard, and Cheryl birthday question
andyf at andyit.com.au
Tue Apr 14 21:52:07 AEST 2015
Colleagues of mine on IRC stumbled upon this (apparently 5th grade!)
24. Albert and Bernard just become friends with Cheryl, and they want to
when her birthday is. Cheryl gives them a list of 10 possible dates:
May 15 May 16 May 19
June 17 June 18
July 14 July 16
August 14 August 15 August 17
Cheryl then tells Albert and Bernard separately the month and the day of her
Albert: I don't know when Cheryl's birthday is, but I know that Bernard
does not know too.
Bernard: At first I don't know when Cheryl's birthday is, but I know now.
Albert: Then I also know when Cheryl's birthday is.
So when is Cheryl's birthday?
No cheating by looking up the answer!
More information about the Link