Safe Speed Forums

By popular demand, (well Big T is popular ), I present three new brainteasers:

1

Four intrepid explorers are captured by bandits in the desert. They are knocked out, and when they come to, they find that they are all buried in the sand up to the tops of their necks, so they cannot turn their heads. They are buried in a line, one behind the other, so they can each see the backs of the heads of those in front of them, except for the one in front, who is behind a wall, so he can't see any of the others and they can't see him.
They are each wearing a brimless hat.
The leader of the bandits then says to them, "Two of you are wearing red hats, and the other two are wearing green hats. If any one of you can correctly guess what colour hat they're wearing, then all of you can go free. But if you guess wrongly then we'll leave you all here to die. Only one of you is allowed to speak.
After a few minutes, one of them guesses - correctly - and they are all freed.
Which one of the four spoke, and how did he know what colour hat he was wearing?

2

You're following a road through the jungle, and come to a fork in the road. You know that the one road leads to where you want to go, and the other road leads to certain disaster. There is a tribesman standing at the fork. You know that there are two tribes living in the jungle, the members of the one who always tell the truth, and the other whose members always lie. You don't know which of the two tribes he belongs to.
You ask him one question, and his answer leaves you in no doubt as to which road to take.
What's your question?

3

Two distinguished maths professors meet at a pub after not seeing each other since they were students. They sit down to eat in the pub garden,and start talking about their lives.
"Do you have any kids?", asks the one.
"Three boys", comes the reply.
"How old are they?"
"Well, the product of their ages is 36", was the answer (they used to enjoy quizzing each other)
The other thought about this for a few moments, then said, "You'll have to give me a bit more than that"
"Well, the sum of their ages is the same as the number of cars in the parking lot"
He pondered this a bit longer, then said, "I'm afraid I need another clue".
"Ok then, my eldest son wears glasses".
He then gave him the answer immediately.

How old were they?

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Only when ideology, prejudice and dogma are set aside does the truth emerge - Kepler

PMed

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Views expressed are personal opinions and are not necessarily shared by the Safe Speed campaign

No 2 is an old one , so I won't answer ,possibly as old as the one about a traveller going to St Ives .But another Q for Pete - crossing a bridge ,I came upon three people , and one was the parent of the other one's son - so what's the relationship ?

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lets bring sanity back to speed limits.
Drivers are like donkeys -they respond best to a carrot, not a stick .Road safety experts are like Asses - best kept covered up ,or sat on

Pete
In Q1 can the man at the back of the row see both of the hats in front of him?

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown

PM'd

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Driving fast is for a particular time and place, I can do it I just only do it occasionally because I am a gentleman.
- James May

Yes

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Only when ideology, prejudice and dogma are set aside does the truth emerge - Kepler

Me? Popular? I think you meant common, like a cold

Ans to Q1: They had big somrero's so they were able to just look up.

I can see I'm in for a long weekend...

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The views expressed in this post are personal opinions and do not necessarily represent the views of Safe Speed.
You will be branded a threat to society by going over a speed limit where it is safe to do so, and suffer the consequences of your actions in a way criminals do not, more so than someone who is a real threat to our society.