Thread: Finding Adam

They each travel into the tunnel for 90 seconds... stop... reverse directions.

They may not come out in the opposite entries to which they started but they'll still emerge in opposite entries to each other.

8 am (0800) or 8 pm (2000), or is that the answer

Originally Posted by corbs

8 am (0800) or 8 pm (2000), or is that the answer

Well done.

Your turn...

Cheers,
Dave

Important note: although the picture below shows them facing us, they are infact facing the wall.

The story:
Four prisoners are buried up to their necks in the ground facing a wall as shown below
They can only see what is infront of them and cannot move in any direction (heads or bodies)
They know there are two white hats and two black hats, they cannot see the colour of their hat
They cannot see through, around, under or over the wall
They cannot communicate with each other in any form
One person must correctly identify the colour of the hat they are wearing
If that person is correct then all four will be released
If that person is incorrect all four will be shot
In 20 minutes, all four will be shot

Numbering from left to right, who can identify what colour hat they have on and why

Which line is the wall? The one separating #1 from #2,3 & 4?

Assuming it is as I said, and the wall is separating #1 and #2.


#3 can see #2 and tells him he is wearing a white hat. #2 then says "I am wearing a white hat" and all 4 are released.

You said they can't look around or over the wall so how can #3 see #4 if he is facing the wall?

EDIT: huh? you pulled your post, stop pulling your post Skew!

Originally Posted by Groggy

You said they can't look around or over the wall so how can #3 see #4 if he is facing the wall?

EDIT: huh? you pulled your post, stop pulling your post Skew!

What you been eating?

Nah, I realised I'd misinterpreted what he meant was the wall.

The wall is between 1 & 2, they cannot communicate. Only one person can make a statement as to the colour of their hat...

If they are wrong...

Bang!

In 20 minutes...

Bang!

Hmmm... well...

#3 can see that #2 has a white hat. He'd know that #4, the bloke behind him, can see both him (#3) and #2. So, if he (#3) had a white hat then #4 would see two white hats and know that he (#4) had a black hat.

However, #4 doesn't call out so #3 knows that he (#3) and #2 have different coloured hats and, knowing that #2 has a white hat calls out "I have a black hat."

Simple, really.

Now my brain hurts.

Go Skew (thought that one might have taken a bit longer)

Got sent this one in an e-mail...

Fiji (in Melanesia) and Samoa (in Polynesia) are two islands in the South Pacific Ocean. Fiji is about 970 kilometers (600 miles) west of Samoa. A small airplane can fly this distance in two hours.

When will you arrive in Fiji if you leave Samoa on a small airplane on Tuesday night at 11:30 PM?

I know... will give others a chance to get it though

11:30pm on tuesday?