How does a blind know the color of his hat?
There are totally 2 red hats and 3 white hats. There are 3 men A, B, C each have a hat on his head. A, B each can see other 2 mans' hats but cannot see his own hat. C is blind.
Now firstly A says he don't know the color of his hat.
And secondly B says he also don't know the color of his hat.
Finally after hearing what A and B said C says he knows the color of his hat.
What is the color of C's hat? How does C know?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
A could have known the colour of his hat if both the hats of B and C were red.
Hence, at least 1 of them has a white hat.
If C were to have a red hat, B could immediately have deduced that his hat was white.
But, since both did not know, this clearly implies that C has a white hat.