Maths question. Really confusing. (1 Viewer)

[Kittikhun]

Does anyone know how to work out this problem from the board of studies multiple choice? I don't comprehend a bit of how you are supposed to do it! I feel so dumb.

http://www4.boardofstudies.nsw.edu....swer=C&courseID=5010&testQuestionID=136204892


Thank you.

 

[rolror88]

I don't think you should be that worried about it. (Dunno how you would measure it on a computer screen..)

But to work it out, you would need to have an actual printed copy of the question, it says its in scale, so you would have to measure the dimensions of it physically, then multiply the dimensions by 2 (because of the scale factor is 1:2)

Then just work out the volume like normal.

 

[suzlee]

I'm presuming they would have resized the diagram when they put it up online...... You can try measuring it with a ruler against the monitor :S

But I wouldn't worry about it

 

[xXmuffin0manXx]

I'm presuming they would have resized the diagram when they put it up online...... You can try measuring it with a ruler against the monitor :S

But I wouldn't worry about it

thats what i just did

and igot 10x5x5

which is 250 =.=;;


edit:
the question is wrong..
it's missing a cm on each length..

so it wouldbe 6x3x3
scaled to 1:2 which would be 12x6x6
which makes it D

 

[suzlee]

thats what i just did

and igot 10x5x5

which is 250 =.=;;


edit:
the question is wrong..
it's missing a cm on each length..

so it wouldbe 6x3x3
scaled to 1:2 which would be 12x6x6
which makes it D

lol well done on your efforts!! So it WAS the actual size

 

[xXmuffin0manXx]

lol well done on your efforts!! So it WAS the actual size

what?

i do hope your being sarcastic

 

[suzlee]

what?

i do hope your being sarcastic

HUH??
Oh.

I skipped the edit bit I think and no I wasn't sarcastic lol

 

[Kittikhun]

Thanks guys!

 

[Kittikhun]

Another one. Sorry, I'm not good at maths.

http://www4.boardofstudies.nsw.edu....swer=A&courseID=5010&testQuestionID=139049657

 

[xXmuffin0manXx]

Another one. Sorry, I'm not good at maths.

http://www4.boardofstudies.nsw.edu.au/testResults.cfm?testID=7070063&testUUID=5C8881FA-D816-5499-5B2BB421815E3757&question_id=4231&question_num=12&correctAnswer=D&user_answer=A&courseID=5010&testQuestionID=139049657

you can put C:

i) perpendicular to B on the bottom
ii) perpendicular to B on the top
iii) perpendicular to A on the bottom
iv) perpenduclar to A on the top
v) middle of AB to the top
vi) middle of AB to the bottom

6 choices

 

[Kittikhun]

Ahem.

http://www4.boardofstudies.nsw.edu....swer=B&courseID=5010&testQuestionID=140097770

Now, this is one is stupid, in my mind, since the expression doesn't actually go with the diagram. Regarde.

http://www4.boardofstudies.nsw.edu....swer=C&courseID=5010&testQuestionID=140106751

 

[Somnolence]

Ahem.

http://www4.boardofstudies.nsw.edu.au/testResults.cfm?testID=7123766&testUUID=6224ADB2-AEE3-2F52-BF4A1E02972FBFB5&question_id=2973&question_num=10&correctAnswer=D&user_answer=B&courseID=5010&testQuestionID=140097770

Now, this is one is stupid, in my mind, since the expression doesn't actually go with the diagram. Regarde.

http://www4.boardofstudies.nsw.edu.au/testResults.cfm?testID=7124253&testUUID=6254A365-06D7-08B5-2FF5269F87904EEF&question_id=824&question_num=10&correctAnswer=D&user_answer=C&courseID=5010&testQuestionID=140106751

There are 2 paths from T to the corner of the larger grid, in which, if you count all the possible routes from that corner to R, you will discover there are 6.

2*6 = 12. - That's how I worked it out.

____

In the final one, the equation does match the diagram. They are asking for the perimeter, and each side is 5cm.

n= number of pentagons, so substitute the number of pentagons in any one part of the pattern and see if it satisfies the equation and gives you the correct perimeter length.

Through trial and error, you will discover that 15n + 10 will always give the correct perimeter.

For 1 pentagon
15 * 1 + 10 = 25cm | There are 5 sides, each five centimetres = 25cm

For 2 pentagons
15 * 2 + 10 = 40cm | There are 8 sides, each five centimetres = 40cm

For 3 pentagons
15 * 3 + 10 = 55cm | There are 11 sides, each five centimetres = 55cm

etc

Hopefully that made it a bit clearer. I'm not always good with explaining things, So I apologize if I have just made it seem more complicated.

 

[Kittikhun]

Thanks. The one about finding the number of possible routes is confusing. I always get lost when I'm counting the routes. Bad memory.

Yep, sorry about the second question. I didn't read it properly and counted the sides inside as well. Using excuses to boost my ego.

Thank you.

 

[Bulldog4lyf]

You're dumb, they're easy.

 

[studentcheese]

You're dumb, they're easy.

That aint very nice. Maybe he's better in other subjects.