# Can you solve this puzzle?

Four people are sitting round a large square table, (one on each side). There is a large obstruction in the middle of the table which prevents each person seeing the person directly opposite them. They are then told to raise their hand if they can see AT LEAST one man.

As it happens they are all men, so they all put their hands up. They are then asked to determine the sex of the person sitting opposite them. After a while, one of them successfully works out that the person opposite is a male.

How does he do it?

There are no other people in the room. No communication is allowed. No mirrors. In fact no trickery whatsoever.

Update:

Sorry Charles but the two people who can see the person opposite you would also see you so they would put their hand up anyway.

Relevance
• 8 years ago

I think the person who answers is a female, as the person on her left and right raised thier hands so they din't obviously raise their hand looking at her (raise hand if you can see one man) so she figured out that way, that the person opposite to her is obviously a man as the men sitting beside her raised their hands looking at that man..

OO no you said all are men.. sorry.. tough to answer..

Hey only conforming - does it look like this? :-

http://www.picpaste.com/pics/Untitled-1-o1eyU5Yp.1...

The man who works out that the opposite person is man saw one or both of the men raise their hands looking at the man opposite to the man who figures out before actually looking at him

say D is opposite to A,

B & C are besides A

so A saw B/C or both raise their hands looking at D before looking at A so obviously he got to know that D is a man

Now Got it right i guess look at this one:-

http://www.picpaste.com/Untitled-2_copy-SQNHkjSj.j...

B looks at A

A looks at C

C looks at D

D looks at C

and they raise thier hands

so A notices C raising his hand looking at D

yessssssss!!!!!!!!!

• 8 years ago

Let's assume the instructions don't count as communication and they are written on the obstruction so there doesn't have to be anyone else in the room at all, or one of the people at the table organised it without knowing who would participate.

The ⊕bstruction only lets you see the person to your left and right, each of those can see you are male and raises their hand, or sees the person opposite you [to their left & right respectively] and raises their hand - this you cannot tell except where you watch both left and right person and check where they look first and if one of them raises their hand before they look at you..., if that's not trickery.

• J C
Lv 5
8 years ago

For convenience, assume you are one of the four and that you come up with the answer.

Assume also that you cannot see your opposite's hand.

If the person opposite you were female then the other two would see you and then raise their hands.

The female would see two hands; and knowing the rules; would know that you must be a man.

Since this did not happen; she must actually be a man.

Edit: Hmmmmmm. Two thumbs down. I must have explained it poorly.

The person who gets it will be the first person who realizes that IF the person opposite them were female then she could deduce the maleness of her opposite after seeing the two hands up.

Since this did not happen; then all four must be male.

This assumes reasonable intelligence in all four and no hermaphrodites and no transgengered or sexually ambiguous people.

• 8 years ago

My guess:

Well, even though a person cannot see who is sitting directly in front of them, they can still see who is sitting beside them. Lets say the people's names are 1-4 so person 1 cannot see person 3, but can see person 2 and 4? Therefore, everyone can see one person at least.

Then, when everyone's hands are up, you can determine their sex by looking at their hands? assuming their hands are stretched out far enough so that the person opposite of them can see their hand. Based on the size of a person's hand, you can maybe tell their sex? ei: large hands are more likely to be male, hairy hands are more likely to be male, etc.

• 8 years ago

Because you can see the person sat next to you. So if the two people on either side of you have their hand up, they can see the person sat next to them (which is the person opposite you) is a male.

It's simple!

• Anonymous
8 years ago

The man on the victorious mans right side, being able to see two men raises his right hand simply because he noticed the man on his right side first. The man on the victorious mans left side, being able to see two men raises his left hand simply because he noticed the man on his left side first. The victorious man noticed this coincidence and realized that the person opposite him was a man.

• 8 years ago

Because the question was put your hand up if you can see at least one man, when the hands were up they saw the hands therefore all the men must've been men, simples.

• Anonymous
8 years ago

because the person who can see them is raising their hand showing that the person that they can see (who is opposite from you) is a man because they were asked to raise there hand if they saw a man.