Quiz - Mind Trap

MagnusB · Post by **MagnusB** » 30 Oct 2003, 22:30

Jalli wrote:There is something special about the number 40, something that no other number has. What is it?

Umm, that it's the only number with the value 40?

I'm sure there are lots of things about the number 40 that you can't find in any other number.

Ky.Jelly · Post by **Ky.Jelly** » 30 Oct 2003, 22:35

zworqy wrote:It's the only number between 39 and 41.

HAAHAHAHAHHHAAHHHAHAAAA!!

actually its the only "whole" number between 39.000* and 41.000* there are infinate other "numbers" between 39.000*and 41.000*

o too technical i know, but im bored

* = recurring

Jalli · Post by **Jalli** » 30 Oct 2003, 22:48

Forget "only value" and stuff. The answer is a bit out there, but it is quite coal.

MagnusB · Post by **MagnusB** » 30 Oct 2003, 22:53

Ky.Jelly wrote:actually its the only "whole" number between 39.000* and 41.000* there are infinate other "numbers"

The word you're looking for is 'integer'.

Ky.Jelly wrote:39.000*
* = recurring

The correct way to write that is 39.000... . Of course that's pointless; you might as well just write 39. You only need to do it like that when you have a number like 38.999... (i.e 38 followed by an infinite number of 9's, which by the way is exactly equal to 39).

Too technical, sure, but you started it.

Ky.Jelly · Post by **Ky.Jelly** » 30 Oct 2003, 23:09

in nz we put a dot over the last recurring number/s but i cant do that on here so had to resort to *,

im sure we had some number chart at school saying the a number and whole number and a raw number where different things, but that was long time ago and i prolly wrong

chux · Post by **chux** » 31 Oct 2003, 01:38

MagnusB wrote:(i.e 38 followed by an infinite number of 9's, which by the way is exactly equal to 39).

No its not! It's about as close as you can get, but its always gonna be 0.000000.........00001 less...ok, ok, its infinate, but still...

about 40 anyway, its the only number that can be x*x*10 and x+x*10 where x is z(original number)/20...

MagnusB · Post by **MagnusB** » 31 Oct 2003, 14:43

chux wrote:
MagnusB wrote:(i.e 38 followed by an infinite number of 9's, which by the way is exactly equal to 39).
No its not! It's about as close as you can get, but its always gonna be 0.000000.........00001 less...ok, ok, its infinate, but still...

No, it is exactly equal to 39. "About as close as you can get to 39" is inifinitely close to 39, and thus equal to 39. There are several ways to prove why 0.999... = 1; read any of these links:

http://www.math.fau.edu/Richman/html/999.htm
http://www.cut-the-knot.org/arithmetic/999999.shtml
http://mathforum.org/library/drmath/view/57174.html
http://www.ucc.ie/mathsoc/divs/point9.html

chux wrote:about 40 anyway, its the only number that can be x*x*10 and x+x*10 where x is z(original number)/20...

That's just because 4 is the only number x for which SQRT(x) = x/2 (i.e, because 2 is the only number x for which x^2 = 2x). Whay you said might be the answer (I doubt it

), but it's still pointless to say it that way.

chux · Post by **chux** » 1 Nov 2003, 18:22

I know it is...seeing as one third (1/3) x3 is 1...and one third is 0.33333...
but it annoys me...it should be 0.9999999999...........

anyway, I wanna know why 40 is so good...

MagnusB · Post by **MagnusB** » 1 Nov 2003, 22:51

chux wrote:I know it is...seeing as one third (1/3) x3 is 1...and one third is 0.33333...
but it annoys me...it should be 0.9999999999...........

anyway, I wanna know why 40 is so good...

If you knew, why did you say it wasn't?

Anyway Jalli, I don't think anyone's going to get this one without hints. It's hard for us to know just what you're asking for.

Jalli · Post by **Jalli** » 2 Nov 2003, 01:16

Hehe, okay. 40 is the only number where the letters are in alphabetical order. F-O-R-T-Y

chux · Post by **chux** » 3 Nov 2003, 13:05

Hmm, would be good, but its F-O-U-R-T-Y...unless you're american...

8-ball · Post by **8-ball** » 3 Nov 2003, 13:54

i think its forty

Post by **SveinR** » 3 Nov 2003, 16:34

So basically that riddle only works in the American-English language and nothing else...Not your best work Jalli

Jalli · Post by **Jalli** » 3 Nov 2003, 19:59

Don't blame me

http://www.stetson.edu/~efriedma/numbers.html

BigRed · Post by **BigRed** » 4 Nov 2003, 07:45

How far can a dog run into the woods?

How many of each species did Moses take onto the ark with him?

Revolt · Post by **Revolt** » 4 Nov 2003, 09:47

BigRed wrote:How far can a dog run into the woods?

half way, then its running out

Juble · Post by **Juble** » 4 Nov 2003, 14:00

BigRed wrote: How many of each species did Moses take onto the ark with him?

so old bigred ;S it was Noah who had the ark

chux · Post by **chux** » 5 Nov 2003, 01:37

Both been said before, and answered by me...i think

who has Mind Trap? they were the besterest riddles

BigRed · Post by **BigRed** » 6 Nov 2003, 08:26

chux wrote:Both been said before, and answered by me...i think

who has Mind Trap? they were the besterest riddles

Sorry.... I couldnt be bothered looking back through all the pages

I have the game.... but I'm too lazy to type out the long ones and they were two short ones

chux · Post by **chux** » 6 Nov 2003, 14:46

ah, if you have the game, you should definately write out some longer ones, they were so good the first time round

BigRed · Post by **BigRed** » 7 Nov 2003, 11:03

K. Sorry if it's already been said.

Scheming Suzie is afraid of monsters hiding under her bed. She usually runs from her bedroom door and leaps onto her bed so the monsters cant get her. Even though Suzie's bed is 4m from the door, she manages to switch off her light and jump into bed before her room is dark. Since Suzie doesn't use any device to flip the switch, how is she able to accomplish this remarkable feat?

That took long enough too type.... no-more long ones and less u really want them.

edit: by the way chux I'll restart the comp if u want. I just looked at the first page and realised what this topic is about

Post by **SveinR** » 7 Nov 2003, 15:20

That one's been said..

Jalli · Post by **Jalli** » 7 Nov 2003, 17:35

I think I maybe took most of the short ones...
Here's some maths for u:

1: If A = 3 + 1/3 and B = A + 1/A, then B = ??

2: The average of A and B is 20, but the average of B and 15 is C/2. The average of A and C is then?

3: Given a regular square with sides = 2. Each of the 4 corners of the square is a center of a circle with radius = 1. Let S be the largest circle that touches (is bars the correct word? only touches in one point) all the 4 circles, and let T be the smallest circle that touches all the four circles. The differense between the areal of S and the areal of T is then?

4: The last digit in 3^10001

5: Let ABCDEFGH be a regular octogon with all sides and angles same size. What is <HBC?

Post by **SveinR** » 7 Nov 2003, 23:15

Blah, I guess I'm not allowed to answer here Jalli?

Jalli · Post by **Jalli** » 7 Nov 2003, 23:25

Well, since I know you got the answers, then maybe not

chux · Post by **chux** » 8 Nov 2003, 19:34

1: 3 and 19/30
2: 12.5 - B
3: 8
4: 3
5: 112.5 Degrees

Jalli · Post by **Jalli** » 8 Nov 2003, 20:04

Not up to usual standards chux, only 1, 4 and 5 was correct.

Rasu · Post by **Rasu** » 8 Nov 2003, 23:46

2. 27.5

Jalli · Post by **Jalli** » 9 Nov 2003, 00:01

Correct Rasu, now who has the skills to solve the last one?

chux · Post by **chux** » 10 Nov 2003, 20:01

4) Too hard...

Edit: Ok...3) Too hard...

jw · Post by jw » 11 Nov 2003, 14:53

Jalli wrote:Correct Rasu, now who has the skills to solve the last one?

4) I think chux was right, isn't it 3?

3^1 ends with a 3
3^2 ends with a 9
3^3 ends with a 7
3^4 ends with a 1

3^5 ends with a 3
3^6 ends with a 9
3^7 ends with a 7
3^8 ends with a 1

since 10001 is 4x2500 + 1 will 3^10001 be the first of a row like above so it will have a 3 as last digit

Jalli · Post by **Jalli** » 11 Nov 2003, 15:37

Never said he was wrong on that one, it is number 3 that is unsolved

jw · Post by jw » 11 Nov 2003, 16:10

hmm, sorry, get fouled by chux ; )
3) {(2 + √8)^2 - (√8 - 2)^2} x π ≈71.08612701

chux · Post by **chux** » 11 Nov 2003, 16:11

Oops, my mistake, edited last post now...

Right, Is thiswhat you mean Jalli? (heh heh, I made that on paint)

Heres what I got so far...
If the sides of the square are 2, then the hypotenuse is Root8. With the radii of the circles added on, this makes the Diameter of S Root8 + 2.
Also, you take away two radii from root8 to get the diameter of T...Root8 - 2
So, the formula of the area of a circle is Pi.r^2, so you have to divide those diameters by two...but because root 8 isn't an integer its really hard...so thats where i gave up.

Anywhere near anything Jalli?

Jalli · Post by **Jalli** » 11 Nov 2003, 16:18

Didn't get that page, but remember that Root8 is same as 2Root2 ...

These tasks are supposed to be done without calculator and answer given in exact values.

jw · Post by jw » 11 Nov 2003, 16:22

exact values: {(2 + √8)^2 - (√8 - 2)^2} x π or: 16 x √2 x π

chux · Post by **chux** » 11 Nov 2003, 19:49

Edit: This was all wrong, but it was the 10,000th post in Non-Elma Related Discussion!

Jalli · Post by **Jalli** » 11 Nov 2003, 21:02

jw, you sure you use the radius and not the diameter?

Bokhylle · Post by **Bokhylle** » 11 Nov 2003, 21:37

Jalli wrote:I think I maybe took most of the short ones...
Here's some maths for u:

1: If A = 3 + 1/3 and B = A + 1/A, then B = ??

2: The average of A and B is 20, but the average of B and 15 is C/2. The average of A and C is then?

3: Given a regular square with sides = 2. Each of the 4 corners of the square is a center of a circle with radius = 1. Let S be the largest circle that touches (is bars the correct word? only touches in one point) all the 4 circles, and let T be the smallest circle that touches all the four circles. The differense between the areal of S and the areal of T is then?

4: The last digit in 3^10001

5: Let ABCDEFGH be a regular octogon with all sides and angles same size. What is <HBC?

ez abel

Jalli · Post by **Jalli** » 11 Nov 2003, 23:32

Correct

I got 87/100, would've been 92 if I didn't do that stupid mistake of getting correct answer but writing wrong option.

chux · Post by **chux** » 12 Nov 2003, 13:50

Jalli wrote:you sure you use the radius and not the diameter?

Yeah

jw · Post by jw » 12 Nov 2003, 16:03

We made a lot of mistakes, really difficult to answer the right question right

ToTaL · Post by **ToTaL** » 12 Nov 2003, 23:35

I saw at Q3 at school and think I solwed it.

First i use pytagoras to find out the diagonal of the square.
square rot of 4^2 + 4^2 = 2.83
With that i can find diameter of T

Td= 2.83-2 = .83
r= .41
AT= pi*r^2= .54

AT = .54
Diameter of S equal diagonal og square + 2 = 2.83+2 = 4.83
r=2.41
AS= pi*r^2 = 18.3

I don't remember if diferanse is when you substract or divide so i don't do that.

BigRed · Post by **BigRed** » 4 Dec 2003, 10:57

"I hear you have three children, Fred," said George in conversation. "What are their ages?"

"Well," said Fred mysteriously, "the product of their ages is 72, and they add up to your house number."

George thought for a moment. "You haven't given me enough information," he said.

"You're right," laughed Fred. "I'll tell you this: my eldest child is learning the oboe."

"That ill woodwind instrument that nobody blows any good!" smiled George wryly. "But at least I now know the answer to my question."

Do you?
Revolt and Swirt can't answer in case they remember the answer

Revolt · Post by **Revolt** » 6 Dec 2003, 04:39

1. Gloria Goodbody opened her own clothing store called "the wrap". She wasnâ€™t sure about pricing certain items so she devised her own method. At "the wrap", a vest cost $20, socks cost $25, a tie cost $15 and a blouse costs $30. Using Gloriaâ€™s pricing scheme, how much would a pair of underwear cost?

2. Sid Shady, who was sporting a large fresh bump on his forehead, was found lying on the pavement just below the jewellerâ€™s window. The ambulance attendants were reviving the unconscious Shady when detective Shadow arrived on the scene. Shadow questioned several eye witnesses and arrested Shady the moment he was coherent. Shady did not have a criminal records nor had he confronted or spoken to anyone that day. Why would shadow arrest him?

BigRed · Post by **BigRed** » 6 Dec 2003, 12:23

Well i would answer cept I gave u the questions and i better not ruin it for others

zworqy · Post by **zworqy** » 6 Dec 2003, 22:36

Revolt wrote:1. Gloria Goodbody opened her own clothing store called "the wrap". She wasnâ€™t sure about pricing certain items so she devised her own method. At "the wrap", a vest cost $20, socks cost $25, a tie cost $15 and a blouse costs $30. Using Gloriaâ€™s pricing scheme, how much would a pair of underwear cost?

$45

Revolt wrote:2. Sid Shady, who was sporting a large fresh bump on his forehead, was found lying on the pavement just below the jewellerâ€™s window. The ambulance attendants were reviving the unconscious Shady when detective Shadow arrived on the scene. Shadow questioned several eye witnesses and arrested Shady the moment he was coherent. Shady did not have a criminal records nor had he confronted or spoken to anyone that day. Why would shadow arrest him?

Maybe the window was broken?

Revolt · Post by **Revolt** » 7 Dec 2003, 01:05

no 1 was right zworqy, but thats not the answer for number 2

chux · Post by **chux** » 7 Dec 2003, 01:15

God!! Why did i not see that for No 1??!?!!
(Its $5 per letter for people who dont know)

2. the bump on his head was actually drugs and the jeweller pushed him over an phoned the cops (and ambulance)

Revolt · Post by **Revolt** » 7 Dec 2003, 01:23

chux wrote: 2. the bump on his head was actually drugs and the jeweller pushed him over an phoned the cops (and ambulance)

nope