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 Post subject: Habs questions
PostPosted: Thu Dec 30, 2010 6:13 pm 
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Joined: Mon Apr 28, 2008 9:57 am
Posts: 223
I was wondering if someone can please help with these questions:

1)Give the precise mathematical name of the three shapes described below:

a) I am a quadrilateral with two pairs of opposite sides of the same length. None of my angles are right angles
b) I am three-dimensional and every point on my surface is at the same distance away from a fixed point

2) When tiling the square wall of my kitchen, I use red and blue square tiles all of the same size. In the pattern all the tiles are red apart from those on the two diagonals which are blue. If I use 37 blue tiles, how many red tiles are needed?

Habs 2003 & 2006

Many thanks for your help


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 Post subject: Re: Habs questions
PostPosted: Thu Dec 30, 2010 6:53 pm 
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Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
b is a sphere, a is parallelogram..

haven;t worked out the tiles yet!
diagram?


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 Post subject: Re: Habs questions
PostPosted: Thu Dec 30, 2010 7:15 pm 
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Joined: Fri Sep 15, 2006 8:51 am
Posts: 8113
Josa wrote:
2) When tiling the square wall of my kitchen, I use red and blue square tiles all of the same size. In the pattern all the tiles are red apart from those on the two diagonals which are blue. If I use 37 blue tiles, how many red tiles are needed?



Ok, two diagonals means there are 2 blue on each row apart from the centre row. so total of

(37-1)/2 = 18 rows with two blue tiles + the centre row = 19

so the square = 19 * 19 = 361 total tiles

red tiles = 361-37=324


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 Post subject: Re: Habs questions
PostPosted: Fri Dec 31, 2010 2:11 pm 
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Joined: Mon Apr 28, 2008 9:57 am
Posts: 223
Thank you so much yoyo123 and hermanmunster.


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 Post subject: Re: Habs questions
PostPosted: Fri Dec 31, 2010 2:43 pm 
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Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
Josa wrote:
Thank you so much yoyo123 and hermanmunster.


what a team...the Hinge and Brackett of Elevenplusexams


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 Post subject: Re: Habs questions
PostPosted: Fri Dec 31, 2010 2:53 pm 
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Joined: Fri Sep 15, 2006 8:51 am
Posts: 8113
Too right Evadne, a splendid duet!

Love Hilda


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