Riddle

well if the veolocity is zero then can you fire a torpido starting from one point, then slightly move to the left and fire another and do the same until you get him. right?
 
this is incredibly easy but ill send it anyway...

A man has a wolf, a goat and several blades of grass with him

The wolf is eager to dine on the goat, and the goat feels the same way about the grass.

If he lives on one side of a river, and has a boat that can only fit him and one other animal(or plant) then how does he get all of them across the river?
 
Wolves don't eat grass...
the first one that the man will carry on the second bank will be goat...
now think further...
 
He moves the goat to the other side (side B for this matter)
He returns to side A and takes the wolf.
He moves the wolf to side B, puts it there and takes the goat back to side A.
He puts the goat in side A and takes the grass to side B.
He returns to side A, takes the goat and puts it in side B.
 
Originally posted by hot7530
well if the veolocity is zero then can you fire a torpido starting from one point, then slightly move to the left and fire another and do the same until you get him. right?
No, I said the velocity could be zero, not is zero. You have to make up a plan that works with any velocity. Besides, if you started at a point and kept on moving to the left, the sub might have started to the right of the starting point, and have a positive velocity or velocity of zero.
 
G man :goodjob:
 
Originally posted by Japanrocks12
G man :goodjob:

Thanx :D It was an easy one really. I wonder what's the solution to WillJ's riddle. At first I though you should just shoot along the line of movement but realized it doesn't fit the rules and I didn't have a breakthrough since...
 
Mm - tricky cos you can shoot a number and have the sub move into it later.

Thats why I asked it vel could be positive or nagative. You cant be sure of whether its left or right of you.

Mm - sounds a bit like a maths probelm involving integers. Need two functions that guarantee to cross.

Time for a longer think.
 
The general of U. S. army heard about infantry moving into his territory, so he sent a column of tanks. Then he got a message from the column, that this infantry is wielding only spears and they don't have any armor. The intrigued general then heard sounds of combat, shots, slashes... and later he heard that all tanks were gone.

HOW WAS THAT POSSIBLE?????
 
Originally posted by Judge_Deadd
The general of U. S. army heard about infantry moving into his territory, so he sent a column of tanks. Then he got a message from the column, that this infantry is wielding only spears and they don't have any armor. The intrigued general then heard sounds of combat, shots, slashes... and later he heard that all tanks were gone.

HOW WAS THAT POSSIBLE?????
:lol: In Civ3, of course!
 
eeeh... I knew that you'll guess it...
 
Originally posted by col
Mm - tricky cos you can shoot a number and have the sub move into it later.

Thats why I asked it vel could be positive or nagative. You cant be sure of whether its left or right of you.

Mm - sounds a bit like a maths probelm involving integers. Need two functions that guarantee to cross.

Time for a longer think.

Let's see...
x = v*t

Now what function could guarantee to cross this when t is a whole number?
 
yeah - but thats not the function

x=x0 + v*t ( t>=0 only )

You could just blast at one square and wait if it were x=v*t but that wont work here because it could be moving away from you.
 
I assumed X0 was the unknown starting point. Also, if V!=1 blasting one square doesn't assure a hit (remember the submarine moves in a straight line, but the torpedos are dots along a certain function)
 
I know this would be risky, but I'm a risk taker.

If the enemy sub always moves on this one line, perhaps getting on that same line would help.
 
Originally posted by Stefan Haertel
I know this would be risky, but I'm a risk taker.

If the enemy sub always moves on this one line, perhaps getting on that same line would help.

That's what I thought, but according to the rules of the riddle it isn't so, as you shoot the torpedo at a certain point and it's a hit only if the sub is in that point. Whatever the torpedo hits on the way to that point doesn't matter.
 
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