View Full Version : Need Math help!!! All geniuses come...

rogue_eclipse

03-09-03, 23:03

Hello everyone. I just have some math questions for those of you who KNOW how to do this sort of stuff. Alright I'm very confused. Don't worry, I'm not cheating!!! This is a warm up my IB teacher assigned me so please help me cause these ones are brain teasers!

1) Alright there are three dots going to the left and three dots going down. There should be a total of NINE dots. Three in each row. So the question is: Without lifting your pencil, draw 4 straight lines segments through ALL of the dots.

Good luck!! I sure couldn't figure it out. tell me if you know! Thanx in advance.

Rogue http://www.tombraiderforums.com/images/smilies/privateeye.gif ps. I've got more coming in a few min.

nuber the dots top row

b

1 2 3

4 5 6

7 8 9 a

start at dot 7 draw up and pass dot 1 to bthen draw down through dot 2 and 6 to a then go to 7 through 9 and 8 and then 5 and 3

Ahhh Rogue, I remember this one! You have to outside the box and do a kind of envelope thing. Unfortunately, I can't illustrate this. But I know what I mean. ;)

Neil's good at "thinking outside the box" :D

rogue_eclipse

03-09-03, 23:21

Aww Thank you both! SO much It took me way too long to figure out. While I was waiting for replies I found a site specifically dealing with that question. So it has the answer. But...I hate not figuring out something on my own so I'm going to try my best for the next 15 minutes then I'll move on.

Next Question:

The total surface area of a cube is 96cm(CUBED) What is the sum of ALL its edges? (edges means the actual edges, alright.

48 cm

total surface area 96 cm squares each sie therfore is 16cm squared, each edge is therefore 4cm and there are 12 edges

http://www.tombraiderforums.com/images/smilies/yikes.gif Man! Math is a language I do not speak or understand! I wish I did though... Neil, can I cal you the next time I need to figure something out and I don't have my calculater with me??? :D

rogue_eclipse

03-09-03, 23:33

Awesome Neil! Your doing great. I'm glad your online!

Next Question: How many whole numbers lie between sqare root 5 and square root 50? Can you give me any steps to get there?

Next question: x(x-3)(x+2)=0 Can you give me any tips to do this one? I need to figure out three values for "x"

Math http://www.tombraiderforums.com/images/smilies/yikes.gif

rogue_eclipse

03-09-03, 23:45

oh common! please help or at least try to explain it to me. It's hard to figure out some of these concepts and whatnot.

Rogue http://www.tombraiderforums.com/images/smilies/mischievous.gif ps. I figured out that dot one on my own! Yey for me!!! http://www.tombraiderforums.com/images/smilies/lei.gif

7 is the lagest 3 is the smallest sorry don't jave a calculator on me but square root of 4 is 2 so 5 will be at bit more so 3 is first number and square root of 49 is 7 which will be highest whole number so answer is 5

are you sure about the last one beacuse x will be 0 as follows from your equation

X x (X-3) x (X+2) = 0

because for any multiplication to equal zero one of the nmbers to be multiplied must be a zero and putting X to zero would do this are you show that the 3 x should not be dfferent letters ie a b c ?

rogue_eclipse

04-09-03, 00:05

Well I dunno. Um that is the question I have written in my work book. It goes like this. x(x-3)(x+2)=0 and then it asks for what three values could equal "x" So??? I have no idea that's why I couldn't figure it out. Could it be a trick Q?

Another Question (nearly the last one) is 2.1+2.3-2.2-1=12. It asks me to put paentheses to make the expression true. The dots are not supposed to be that low. On my paper they are a little higher so I don't know whether they are decimals.

no jsut worked it out as I sais before anything mutiplied by a ) will equal 0 so the 3 possible values will be 0 2 or 3

No, it is not a trick question. There are three possible answers for x(x-3)(x+2)=0. Thay are x=0, x=3, or x=-2. Since the equation is already factored, you just set each of the terms equal to zero and solve each for x :D

And for the last one:

2x(1+2)+(3-2)x2-1=12

There were multiplication dots, not decimals.

rogue_eclipse

04-09-03, 00:19

Wow thanks Trinity! You have a way with words. Umm I think that's all. Thank you so much. especially Neil for giving his time to answer these questions. Fellow gamer, Rogue http://www.tombraiderforums.com/images/smilies/wave.gif

Opps! I forgot one!!! Ok I figured that it would be 40 but I'm pretty sure I'm wrong because I think this is a trick. The question is: 120% of 300%= ? Can you tell me how to figure it out properly? that's the last one. Yey. Thanks again everyone who helped Buh-Bye

Err.. nevermind on that one. I forgot some parenthesis. Must check again.

The question is: 120% of 300%= ? Can you tell me how to figure it out properly?

100% is staring point 300% of 100% is 3 times 100% = 300% so therefore 120% of 300 is 300% x 1.2 =360%

sorry still trying to do the othre one damn hard

Now I got the 12 one.

2 x (1 + 2 x 3) - 2 x (2 - 1) = 12

Hurray

2 x (1+(2x3))-2 x (2-1)= 12

http://www.tombraiderforums.com/images/smilies/music2.gif

Originally posted by Trinity:

Now I got the 12 one.

2 x (1 + 2 x 3) - 2 x (2 - 1) = 12you missed out the parenthisis as done in my result thnak god I'm not at school any more

rogue_eclipse

04-09-03, 00:50

You two are fun! Woah I wish I didn,t have to do all this. It's hard!!! I still can't figure out that 100% 300% one. I know that 300% is three times 100%. So why isn't 120% of 300%... Wait a second!!! I just read it outloud and totally got it! Waaaahooooo! yeepee! Okay thank you all.

http://www.tombraiderforums.com/images/smilies/music2.gif I'm going to celebrate and watch Lord of the rings. Hehehe

If there is no more questions I must go to bed its 1.50 am here

Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Trinity:

Now I got the 12 one.

2 x (1 + 2 x 3) - 2 x (2 - 1) = 12you missed out the parenthisis as done in my result thnak god I'm not at school any more</font>[/QUOTE]I "missed out the parenthesis"? Do you mean that I forgot to put them around the 2x3 like you did? In that case, they are not needed there.

Glad I could help, Rogue. I love math.

These problems really aren't that hard. Just pick a point to start and go from there. Take it slow so you don't overload yourself and get confused.

Originally posted by Trinity:

</font><blockquote>quote:</font><hr />Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Trinity:

Now I got the 12 one.

2 x (1 + 2 x 3) - 2 x (2 - 1) = 12you missed out the parenthisis as done in my result thnak god I'm not at school any more</font>[/QUOTE]I "missed out the parenthesis"? Do you mean that I forgot to put them around the 2x3 like you did? In that case, they are not needed there.

Glad I could help, Rogue. I love math.

These problems really aren't that hard. Just pick a point to start and go from there. Take it slow so you don't overload yourself and get confused.</font>[/QUOTE]There are needed otherwise you would have 1 + 2 x 3 which would give 6 you do the equatu=ion insdie the parenthesis first then work outwards

No, according to order of operations, multiplication and division are done from left to right before addition and subtraction. Therefore, parenthesis are not needed in this case.

Hey Neil, is it the Ti-83? ;)

Math! http://www.tombraiderforums.com/images/smilies/hug.gif

Why haven't I noticed this thread? :confused:

Originally posted by TR-Player:

Math! http://www.tombraiderforums.com/images/smilies/hug.gif

Why haven't I noticed this thread? :confused: http://www.tombraiderforums.com/images/smilies/yuck.gif

http://www.tombraiderforums.com/images/smilies/wave.gif

lol

Hi ELEN! http://www.tombraiderforums.com/images/smilies/wave.gif

Were you up all night? :D

Morning TR-Player http://www.tombraiderforums.com/images/smilies/smile.gif

No, I was taking a break :D http://www.tombraiderforums.com/images/smilies/tongue.gif

OK!

Well I have to go cya later! http://www.tombraiderforums.com/images/smilies/wave.gif

Originally posted by Draco:

Hey Neil, is it the Ti-83? ;) What do you mean by that Draco

Trinty Its been 19 years since I last had to do maths so I may be a bit rusty no disrespect intend

Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Draco:

Hey Neil, is it the Ti-83? ;) What do you mean by that Draco

Trinty Its been 19 years since I last had to do maths so I may be a bit rusty no disrespect intend</font>[/QUOTE]Its an advanced calculator... http://www.tombraiderforums.com/images/smilies/smile.gif

Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Draco:

Hey Neil, is it the Ti-83? ;) What do you mean by that Draco

Trinty Its been 19 years since I last had to do maths so I may be a bit rusty no disrespect intend</font>[/QUOTE]That's ok, Neil :D

Originally posted by Draco:

</font><blockquote>quote:</font><hr />Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Draco:

Hey Neil, is it the Ti-83? ;) What do you mean by that Draco

Trinty Its been 19 years since I last had to do maths so I may be a bit rusty no disrespect intend</font>[/QUOTE]Its an advanced calculator... http://www.tombraiderforums.com/images/smilies/smile.gif </font>[/QUOTE]No its a casio scientifc fx451 I've had it since I was 14 its was top of the range then about 21 years ago!

Hey Guys. You sahould see my calculator! I still have the wind up key! http://www.tombraiderforums.com/images/smilies/privateeye.gif

Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Draco:

</font><blockquote>quote:</font><hr />Originally posted by neil4768:

</font><blockquote>quote:</font><hr />Originally posted by Draco:

Hey Neil, is it the Ti-83? ;) What do you mean by that Draco

Trinty Its been 19 years since I last had to do maths so I may be a bit rusty no disrespect intend</font>[/QUOTE]Its an advanced calculator... http://www.tombraiderforums.com/images/smilies/smile.gif </font>[/QUOTE]No its a casio scientifc fx451 I've had it since I was 14 its was top of the range then about 21 years ago!</font>[/QUOTE]Now you're catching on... http://www.tombraiderforums.com/images/smilies/smile.gif

I had a fx7400 not long ago...at least I think it was a 7400...

Originally posted by tippucat:

Hey Guys. You sahould see my calculator! I still have the wind up key! http://www.tombraiderforums.com/images/smilies/privateeye.gif I made an abacus in wood shop...

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