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 Post subject: Bond Assessment Papers Bk1 - Paper 9 Qu31-34Posted: Fri Aug 17, 2012 8:54 pm

Joined: Wed May 02, 2012 12:32 pm
Posts: 6
Could someone tell me how to work this out? It's the second time a question like this has come up and I've not been able to explain it!

3 pencils and 4 ballpoint pens cost £1.70.
3 pencils and 2 ballpoint pens cost £1.30.

Use this information to find the cost of:

2 ballpoint pens?
1 ballpoint pen?
3 pencils?
1 pencil?

Would greatly appreciate the help - have a feeling it's really obvious and I'm just being dim! Thanks

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 Post subject: Re: Bond Assessment Papers Bk1 - Paper 9 Qu31-34Posted: Fri Aug 17, 2012 9:06 pm

Joined: Mon Aug 22, 2011 8:20 pm
Posts: 1706
Location: Warwickshire
3 pencils and 4 ballpoint pens cost £1.70.
3 pencils and 2 ballpoint pens cost £1.30.

Use this information to find the cost of:

2 ballpoint pens?
1 ballpoint pen?
3 pencils?
1 pencil?
3 pencils and 4 ballpoint pens cost 40p more than 3 pencils and 2 ballpoint pens, therefore 2 ballpoint pens cost 40p
-> 1 ballpoint pens costs 20p
3 pencils and 2 ballpoint pens cost £1.30, and we know that 2 ball point pens cost 40p, therefore 3 pencils cost 90p
-> 1 pencil costs 30p

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 Post subject: Re: Bond Assessment Papers Bk1 - Paper 9 Qu31-34Posted: Fri Aug 17, 2012 10:23 pm

Joined: Wed May 02, 2012 12:32 pm
Posts: 6
Thank you very much, I see it now.

I still can't seem to apply it to this question in one of the 11+ DIY Papers though -

6 JELLYS and 3 GALAXY CARAMEL cost £7.11. 3 GALAXY CARAMEL and 6 CURLY WURLY cost £6.57.
How much does 1 JELLYS, 1 GALAXY CARAMEL and 1 CURLY WURLY cost?

I've tried and tried! Please put me out of my misery...

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 Post subject: Re: Bond Assessment Papers Bk1 - Paper 9 Qu31-34Posted: Fri Aug 17, 2012 10:42 pm

Joined: Mon Aug 22, 2011 8:20 pm
Posts: 1706
Location: Warwickshire
6 JELLYS and 3 GALAXY CARAMEL cost £7.11.
3 GALAXY CARAMEL and 6 CURLY WURLY cost £6.57.
How much does 1 JELLYS, 1 GALAXY CARAMEL and 1 CURLY WURLY cost?

Add them together and you get
6 JELLYS + 3 GALAXY CARAMEL + 3 GALAXY CARAMEL + 6 CURLY WURLY costs £7.11 + £6.57
which simplified is
6 JELLYS + 6 GALAXY CARAMEL + 6 CURLY WURLY costs £13.68
divide £13.68 by 6 to get the answer £2.28

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