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 Post subject: Help on questionPosted: Thu Sep 04, 2008 12:25 pm

Joined: Thu Oct 11, 2007 9:21 pm
Posts: 183
Location: Medway/Kent
I have seen this type of question on many papers and have never known an easy way of working it. I am sure there are some clever people out there that can.

Juliet and her friends are delivering leaflets around the local housing estate where she wonâ€™t have to walk down the same street more than once (she can pass over the same corners more than once). On which of these street layouts is this possible?
You are then given a series of shapes to chose from (sorry I cannot copy these in)

Does anyone have any ideas?
reddebs

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 Post subject: Posted: Thu Sep 04, 2008 7:51 pm

Joined: Wed Jan 02, 2008 12:18 pm
Posts: 490
Location: kent
Just try it out and see .... I don't remember seeing any difficult ones like this in the NFER practice paper packs. Or is your 11+ not set by NFER?

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 Post subject: Posted: Thu Sep 04, 2008 8:38 pm

Joined: Mon Aug 25, 2008 7:07 pm
Posts: 55
Oh I have that one the ansew Is a triangle with triangles in all directions inside it if that is there LOL.

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Emma

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 Post subject: Posted: Fri Sep 05, 2008 7:39 am

Joined: Tue Jan 01, 2008 1:05 pm
Posts: 515
This is about as far as we got on the subject before.

viewtopic.php?t=4950

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 Post subject: Posted: Fri Sep 05, 2008 11:31 am

Joined: Fri Sep 05, 2008 11:28 am
Posts: 63
I can't be sure of the answer without seeing the options.

However, I think the 'simple' answer is that any layout with less than 2 nodes (i.e. places where roads join or cross) with an odd number of roads is doable without repeating ... if it has three or more places where there are a odd number, it's not possible.

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 Post subject: Posted: Fri Sep 05, 2008 1:42 pm

Joined: Tue Jan 01, 2008 1:05 pm
Posts: 515
ks wrote:
I can't be sure of the answer without seeing the options.

However, I think the 'simple' answer is that any layout with less than 2 nodes (i.e. places where roads join or cross) with an odd number of roads is doable without repeating ... if it has three or more places where there are a odd number, it's not possible.

I think it is safe to assume that all 11+ questions will be doable, or have an answer. I think the original question was in the hope that someone could come up with a quick method to address all such questions.

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 Post subject: Posted: Sat Sep 06, 2008 1:06 pm

Joined: Fri Sep 05, 2008 11:28 am
Posts: 63
i was obviously not clear enough.
The original question asked 'which layouts were possible'.

The layouts are possible (refered to as doable in my previous post) is there are 2 or less places where an odd number of roads link.

The doable did not refer to whether the question was doable or not : as you rightly say they all are.

If my answer is still not clear I can try & expand further. But try it, it works on any road layout.

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 Post subject: Posted: Sun Sep 07, 2008 1:34 pm

Joined: Thu Aug 16, 2007 8:40 pm
Posts: 5
Try drawing each shape on a paper without interrupting the line. You are not allowed to go over the same line twice.
Hope my method is not very complicated.

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