Chartered Accountant / MBA
944 Points
Joined March 2008
If i were the Prince, I ask the Princess "what wud be ur reply yesterday if i had asked u which one of the two boxes contains d ring." n i select the box just opposite to her reply. n i m sure tht d box i selecte contains d ring.
logic/explanation of my answer: if it's a day whn she speaks truth then her answer wud be d same as she wud replied yesterday (which is but obvious a day, she speaks lie)n yesterday;s reply is a false reply n as i decided to select the other box than her answer's box, i will find d ring.
now assumed if it is a day whn she speaks lie it means yesterday was d day whn she speaks truth. her yesterday reply wud be the correct answer but today she will revrse the answer n again indicate me to a false one and again i select the box which is not in her answer. n will get the ring and Princess too.
Kindly note tht u may also ask dis way "what will be ur reply tomorrow if i will ask u which one of d two boxes contains d ring."
CA Naveen Kumar Agrawal.