Maths- Gym for Brainiacs

Kamina wrote:Mole visited the thread and was annoyed

He proposed a question which doesn't require any knowledge in maths:[/color]

What's between mountain and valley?

requirements: none

halamadrid2 wrote:lol i actually dont know babun... was thinking of 1/2 sine something but my mind has just gone blank... could you show us

Kamina wrote:Mole visited the thread and was annoyed

He proposed a question which doesn't require any knowledge in maths:[/color]

What's between mountain and valley?

requirements: none

grass i suppose or mud

Kamina wrote:
First part: you could render the two sides from the corner to a triangle and calculate its area. The area is something like A= sin(a)*0.5*b*c . sin(a) will be sqr2 /2 which means a=45°

To the other part, the answer is more ridiculious than that. Think of Mole and you'll be able to answer the question

halamadrid2 wrote:

Kamina wrote:
First part: you could render the two sides from the corner to a triangle and calculate its area. The area is something like A= sin(a)*0.5*b*c . sin(a) will be sqr2 /2 which means a=45°

To the other part, the answer is more ridiculious than that. Think of Mole and you'll be able to answer the question

ohh yh thats what i was thinking of but didnt know what to use for b and c as there was no lengths... oh thanks for the solution

more rudiculous??? people lol

Fun and somewhat logical question:

How would a mathematician catch a lion in an instant in a desert if he's got a 4x4 meter cage ?

requirements: sense of humor and some basic knowledge in maths theorie

Kamina wrote:

Fun and somewhat logical question:

How would a mathematician catch a lion in an instant in a desert if he's got a 4x4 meter cage ?

requirements: sense of humor and some basic knowledge in maths theorie

Try to solve this one. A hint, you have to work with definitions

halamadrid2 wrote:

Kamina wrote:

Fun and somewhat logical question:

How would a mathematician catch a lion in an instant in a desert if he's got a 4x4 meter cage ?

requirements: sense of humor and some basic knowledge in maths theorie

Try to solve this one. A hint, you have to work with definitions

dont get it... is it to do with math or logical explenation

halamadrid2 wrote:

Kamina wrote:

Fun and somewhat logical question:

How would a mathematician catch a lion in an instant in a desert if he's got a 4x4 meter cage ?

requirements: sense of humor and some basic knowledge in maths theorie

Try to solve this one. A hint, you have to work with definitions

dont get it... is it to do with math or logical explenation

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

spanky489 wrote:

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

she was near the middle of the "sea"

kiranr wrote:

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

She should swim around in a spiral manner with the pitch of that helix being lesser than 0.25 times the radius of the circle.

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

Kamina wrote:
Good idea but if she swims as spiral as you suggest her way will become much longer You need to modify your answer

RealGunner wrote:She calls in a jet ski ?

spanky489 wrote:shes at the center and swims to the end opposite of the rapist.

kiranr wrote:

Kamina wrote:
Good idea but if she swims as spiral as you suggest her way will become much longer You need to modify your answer

Then does she go in straight lines instead of a spiral?

halamadrid2 wrote:

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

she takes the boat... just kidding lol

would she adjust the angle she swims such that it forms a sector of a circle

by that she would increase the arc length of the circle and the amount of time he takes to catch up would be more than 4 times and he wouldnt keep up

Kamina wrote:

RealGunner wrote:She calls in a jet ski ?

It's a math thread, nothing riddle related

spanky489 wrote:shes at the center and swims to the end opposite of the rapist.

I suspect you're a rapist because with your method she'd be caught 100%

kiranr wrote:

Kamina wrote:
Good idea but if she swims as spiral as you suggest her way will become much longer You need to modify your answer

Then does she go in straight lines instead of a spiral?

What will happen if she swims straight?

halamadrid2 wrote:

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

she takes the boat... just kidding lol

would she adjust the angle she swims such that it forms a sector of a circle

by that she would increase the arc length of the circle and the amount of time he takes to catch up would be more than 4 times and he wouldnt keep up

You and kiranr are close to the answer but can't see it. Draw a circle somewhere, maybe you'll see the light

halamadrid2 wrote:ok here is a paint ive tried to draw lol




basically she turns about 110 or more degrees instead of swimming to A/B she swims to C she swims straight to the shores and since he is 4 times faster than her it wouldnt matter as it would be too far from him anyways so he wouldnt be able to keep up(it would also form a bearing but cant draw that was well)

spanky489 wrote:

Kamina wrote:

RealGunner wrote:She calls in a jet ski ?

It's a math thread, nothing riddle related

spanky489 wrote:shes at the center and swims to the end opposite of the rapist.

I suspect you're a rapist because with your method she'd be caught 100%

kiranr wrote:

Kamina wrote:
Good idea but if she swims as spiral as you suggest her way will become much longer You need to modify your answer

Then does she go in straight lines instead of a spiral?

What will happen if she swims straight?

halamadrid2 wrote:

Kamina wrote:Next question, junior high level

A very beautiful marathon runner girl is swimming in the middle of a circular sea in the morning. A rapist sees her there and awaits her arrival to the shore, of course, he keeps the distance as close as possible... She notices him and escapes

The question, how did she escape if the rapist runs 4 times as fast as the girl swims?

she takes the boat... just kidding lol

would she adjust the angle she swims such that it forms a sector of a circle

by that she would increase the arc length of the circle and the amount of time he takes to catch up would be more than 4 times and he wouldnt keep up

You and kiranr are close to the answer but can't see it. Draw a circle somewhere, maybe you'll see the light

ok she starts in the middle and swims in a parabola towards land in the same way the rapist is running.

Kamina wrote:

halamadrid2 wrote:ok here is a paint ive tried to draw lol




basically she turns about 110 or more degrees instead of swimming to A/B she swims to C she swims straight to the shores and since he is 4 times faster than her it wouldnt matter as it would be too far from him anyways so he wouldnt be able to keep up(it would also form a bearing but cant draw that was well)

I don't get your answer completely but it seems wrong

halamadrid2 wrote:

Kamina wrote:

halamadrid2 wrote:ok here is a paint ive tried to draw lol




basically she turns about 110 or more degrees instead of swimming to A/B she swims to C she swims straight to the shores and since he is 4 times faster than her it wouldnt matter as it would be too far from him anyways so he wouldnt be able to keep up(it would also form a bearing but cant draw that was well)

I don't get your answer completely but it seems wrong

basically, first its a straight line to the shore... but the rapirst is there so she turn and swims in another direction producing an angle of whatever, this would create an arc length and it would be too far from him so she can swim there before he catches up and call the police lol

Kamina wrote:People, assume the radius of the cricle is a 1, then the perimeter would be P=2*pi. If she swims from the centre in the opposite direction straight, then she'll swim 1 unit but the rapist will run 4*1 which is greater than pi=3.14..... He'll catch her
Think of a proper solution, kiranr's spircal idea wasn't bad ot begin with

spanky489 wrote:

Kamina wrote:People, assume the radius of the cricle is a 1, then the perimeter would be P=2*pi. If she swims from the centre in the opposite direction straight, then she'll swim 1 unit but the rapist will run 4*1 which is greater than pi=3.14..... He'll catch her
Think of a proper solution, kiranr's spircal idea wasn't bad ot begin with

why will the rapist run 4*1?