Wednesday, April 04, 2007

Answers to IQ Questions

Qn 1: I shld qualify tt these are new pairs of socks, hence every pair is attached tog. SO...the blind men will just nid to separate each pair of socks and accordingly, 1 sock will go to each man. By the time they get thru the 6 pairs, they will hv 3 pairs of red, green n blue socks still!

I know they still can't see which matches to which, but note tt I only said they should end up with 3 pairs of red, green and blue socks, and not tt they must b paired together correctly! =)

(Credit goes to LKY for the answer to Qn 2, cos he emailed me to ask if it's correct. Since he got it 100% correct, I shall free-ride and copy his answer for the benefits of those who may be guessing!)

Qn 2: Ok, since ANY of them can just shout out the colour once they noe, Man 3 need not wait for Man 2 to shout out first.

Since Man 3 can see what Man 1 and Man 2 are wearing, he'd be able to confidently shout out the colour of his own hat if the first 2 are wearing the same colour (since there are only 2 hats of one colour each). For example, if Men 1 and 2 are both wearing white hats, then he must be wearing a black one. And he would shout out 'black!'. Then Man 2 would noe that his hat is the same colour as Man 1 (since Man 3 can CONFIDENTLY shout out his own) and therefore he'll shout out 'white!' and vice versa.

But, if Man 1 and Man 2 are wearing opposite colours, then Man 3 can't be certain what his colour is, so he'd probably HESITATE and keep quiet. Then in this case, Man 2 would noe that his is different from Man 1's and guess his colour of the hat correctly.

So did U get the answers? =)