While a red mark was placed on the forehead of each of three blindfolded women seated facing each other in a circle, they were told that the the mark might be either red or white. Upon removal of the blindfolds, each was to raise her hand if she saw at least one red mark, and then to take it down if she could logically deduce the color of her own mark. All three hands were quickly raised, but then one of them lowered her hand. How did she know?
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March 27th, 2010 - 00:15
let 1st lady have red one.
2nd lady has white one
3rd lady has red one
all three raises there hands
since
1st sees 3rd lady’s red.
2nd sees 1st lady’s red.
3rd sees 1st lady’s red.
1nd lady logically deduce that she got a red one since she saws that the 3rd lady raises her hand and hand raised is not for the 2nd lady having a white one so,automatically she got a red one.
April 6th, 2011 - 12:52
all 3 have red marks
September 7th, 2009 - 11:42
Well, tricky one and checked the solution on net. I do not completely agree with the fact that one can deduce the color of the hat.