Liverpool FC Forum

by **stmichael** » Tue Jul 18, 2006 11:54 am

A few brainteasers for today.

1. It takes a man an hour to dig a hole. How long does it take two men to dig half a hole?

2. A water lily growing in a circular pond doubles in size every day. It takes thirty days to cover the whole pond. How long does it take to cover half the pond?

3. A builder builds 100 houses. He has to number them all so he goes to the hardware store. How many no. 9's does he buy?

4. A man is travelling from the country to Dublin. He comes to a T-Junction. There are no signposts. He spots a house down the road and decides he will go and ask whoever lives there the way to go. Just before he enters the garden, a little boy comes up and tells him that there are twins living in the house on their own. He says that one of them always tells the truth and one of them always lies and that no one can tell which is which. He also says that anyone who wants information can only ask them one question and that is it.

Bearing in mind that he won't know which twin answers the door.. what question does he ask, and then, what action does he take to make sure he goes the right way?

5. Spot the error in this? There was a taxi outside a hotel. A man came out, hit the taxi driver on the head, took all the money out of the meter and started to run off, only to be rugby-tackled by the commissionaire?

6. A farmer has to transport a fox, a goose and a sack of grain across a river. The boat is so small that there is room only for him and one of the others at a time, but if he leaves the fox and goose together the fox will kill the goose, and if the goose and the sack of grain are left together the goose will eat the grain. How does he get them all over?

Answers to follow within the next 48 hours.

by **112-1077774096** » Tue Jul 18, 2006 11:56 am

1. you cant dig half a hole

by **112-1077774096** » Tue Jul 18, 2006 11:57 am

3. 11

by **112-1077774096** » Tue Jul 18, 2006 12:00 pm

4. he needs to ask "if i were to ask the other person, which way would he tell me to go?". If he asked the the truth teller, then the truth teller would say the truth, in that the liar person would lie and say the wrong way, so he would say the wrong way as well. So you would choose the opposite. If you asked the liar, since the truth teller would say the right way he must lie so the liar will say the opposite of that as well which of course is the wrong way. In either case they will both point to the wrong way. (Though for different reasons)

something like that anyway, does it make sense

by **dawson99** » Tue Jul 18, 2006 12:01 pm

2: 29 days

by **112-1077774096** » Tue Jul 18, 2006 12:04 pm

6. he takes accross the goose first, then comes back and takes accross the fox, he brings the goose back with him leaving the fox, he then takes the grain, comes back and then takes the goose accross

by **112-1077774096** » Tue Jul 18, 2006 12:19 pm

5. im not sure about this but the meter does not have any money, is that the mistake

by **dward** » Tue Jul 18, 2006 12:38 pm

1) It's impossible to dig half a hole

2) 29

3) 20

4) If I were to ask your brother whether you always tell the truth, what would he say?

If he says no it means I'm talking to tone who tells the truth, if he says yes it means he's the liar.

5) A meter doesn't have any money

6) 1st - take goose only, leave fox and grain.

2nd - take fox over then leave fox on other side and bring goose back

3rd - take grain over so it's with fox.

4th - go back and get goose and take it over.

I think that's all right

by **112-1077774096** » Tue Jul 18, 2006 12:41 pm

how do u get 20 for number 3.

9, 19, 29, 39, 49, 59, 69, 79, 89, 99.

unless you are buying number 9s to use as number 6, which you canbt do if the are patterned as it will then be upside down

by **dward** » Tue Jul 18, 2006 12:42 pm

peewee wrote:how do u get 20 for number 3.

9, 19, 29, 39, 49, 59, 69, 79, 89, 99.

unless you are buying number 9s to use as number 6, which you canbt do if the are patterned as it will then be upside down

I'll PM you as to not spoil it for others.

by **112-1077774096** » Tue Jul 18, 2006 12:50 pm

haha i totally missed that mate, i feel like an idiot now :laugh:

by **supersub** » Tue Jul 18, 2006 12:52 pm

stmichael wrote:3. A builder builds 100 houses. He has to number them all so he goes to the hardware store. How many no. 9's does he buy?[/b]

five ...they were all even numbers so only 90 92 94 96 98

by **Leonmc0708** » Tue Jul 18, 2006 12:56 pm

stmichael wrote:A few brainteasers for today.

1. It takes a man an hour to dig a hole. How long does it take two men to dig half a hole?

2. A water lily growing in a circular pond doubles in size every day. It takes thirty days to cover the whole pond. How long does it take to cover half the pond?

3. A builder builds 100 houses. He has to number them all so he goes to the hardware store. How many no. 9's does he buy?

4. A man is travelling from the country to Dublin. He comes to a T-Junction. There are no signposts. He spots a house down the road and decides he will go and ask whoever lives there the way to go. Just before he enters the garden, a little boy comes up and tells him that there are twins living in the house on their own. He says that one of them always tells the truth and one of them always lies and that no one can tell which is which. He also says that anyone who wants information can only ask them one question and that is it.

Bearing in mind that he won't know which twin answers the door.. what question does he ask, and then, what action does he take to make sure he goes the right way?

5. Spot the error in this? There was a taxi outside a hotel. A man came out, hit the taxi driver on the head, took all the money out of the meter and started to run off, only to be rugby-tackled by the commissionaire?

6. A farmer has to transport a fox, a goose and a sack of grain across a river. The boat is so small that there is room only for him and one of the others at a time, but if he leaves the fox and goose together the fox will kill the goose, and if the goose and the sack of grain are left together the goose will eat the grain. How does he get them all over?

Answers to follow within the next 48 hours.

3. 11

by **dawson99** » Tue Jul 18, 2006 12:58 pm

11?

it could be anything, depends how many 6's he buys... someone pm me if im being a dipsh about this?

by **mitch22** » Tue Jul 18, 2006 1:03 pm

dward wrote:
peewee wrote:how do u get 20 for number 3.

9, 19, 29, 39, 49, 59, 69, 79, 89, 99.

unless you are buying number 9s to use as number 6, which you canbt do if the are patterned as it will then be upside down

I'll PM you as to not spoil it for others.

missed out 90

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