Brain teaser thread

[OzzyKP]

Originally posted by rah


I used pen'n'paper for that one too. But being part german, I had to make a real NEAT grid to help me solve it. It took me almost an hour, where you took less than 30 minutes. If someone had posted it in less than 15 minutes, I would have declared cheat, that they must have seen it already or looked it up on the internet..

I did it in 15 minutes, or not much longer than that with a pen and paper.

[Capt Dizle]

Originally posted by Immortal Wombat
ok, this is a real b!tch of a question, and its been posted here before, but if anyone wants to explain how they got the answer () they are more than welcome.

A rope over the top of a fence has the same length on each side. It weighs one third of a pound per foot. On one end hangs a monkey holding a banana, and on the other end a weight equal to the weight of the monkey. The banana weighs two ounces per inch. The rope is as long (in feet) as the age of the monkey (in years), and the weight of the monkey (in ounces) is the same as the age of the monkey's mother. The combined ages of the monkey and its mother are thirty years. One half the weight of the monkey, plus the weight of the banana, is one fourth as much as the weight of the weight and the weight of the rope. The monkey's mother is half as old as the monkey will be when it is three times as old as its mother was when she was half as old as the monkey will be when it is as old as its mother will be when she is four times as old as the monkey was when it was twice as old as its mother was when she was one third as old as the monkey was when it was as old as its mother was when she was three times as old as the monkey was when it was one fourth was old as it is now.

How long is the banana?

Gar! 5.75 inches.

[NeOmega]

monkey problem

1 inch

[Capt Dizle]

Re: monkey problem

Originally posted by NeOmega
1 inch

Your monkey must have been hungrier than mine.

[NeOmega]

2 inches..... I'm figuring it's a whole number. I'm just gonna gues till Im right cuz this one sucks and it's been done already. Of course dude posted it like 6 hours ago, but nobody really even wnats to try and figure it out.... cuz, well, it SUCKS.

[NeOmega]

now my monkey is getting mad and flinging dung at immortal wombat.

[Capt Dizle]

No, calm down. It's 5.75 inches. Work it out.

[Capt Dizle]

Da momma was six when the baby was born.

[NeOmega]

good, if it's 5.75 post the next one please.........

[Capt Dizle]

Caught in a flood four moderators are trapped on the wrong side of a river. They will drown unless they can all get across a log to the other side in 17 minutes. The log will only support the weight of two people at once, and it is dark and will require a flashlight to cross. There is only one flashlight. Ming is spry and can cross in one minute, Rah is quick and can cross in 2. But MTG is timid and takes 5 minutes and Markos is fat and requires 10 minutes to get across.

How can all four get across in 17 minutes?

[Zero-Tau]

First Ming and rah crosses (2 min).
Then Ming returns with the flashlight (1 min).
Then Markos and MTG crosses (10 min).
Rah goes back with the flashlight (2 min).
Then Ming and rah crosses (2 min).

That's 17 minutes total.

[Capt Dizle]

Damn, and I hoped we would finally be rid of them all!



Your turn.

[Zero-Tau]

Well, I've posted a riddle here already, and I don't have one handy right now, so....

First come, first served. First person to post a new riddle gets to continue.

[CapitanGarlic]

Easy one.

A man was born before his father, he killed his mother, and he married his sister.

Despite this, he was considered 'normal'. How?

[OzzyKP]

Originally posted by jimmytrick
No, calm down. It's 5.75 inches. Work it out.

Tell me how you solved that. I spent an hour working on it. I assumed the part about the ages of the monkey and mama monkey was extra info to mislead you, so I disregarded that.

I got as far as (and lord I hope this at least is right):

the rope length (rl) in inches is equal to three times the banana length (bl) in inches minus 15 over 2.

rl = (3bl-15)/2

If that is correct, and if the banana length is 5.75, then the rope length would be 1.125 inches.

Tell me how you solved it.