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PostPosted: Sun Jan 18, 2015 9:15 pm 
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could anyone please help with the answer to No.26 and how to work it out



of Emmanuel Sample 11+ Maths papers in the link below.

need to confirm the correct answer for this one.


http://www.emanuel.org.uk/media/Admissi ... _Maths.pdf.



your help is much appreciated


Thank you


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PostPosted: Sun Jan 18, 2015 9:26 pm 
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What answer did you get?


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PostPosted: Sun Jan 18, 2015 10:02 pm 
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oh my daughter got 43metres.


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PostPosted: Sun Jan 18, 2015 10:19 pm 
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Location: Chelmsford and pleased
Reverse the journey.
1, 3, 5, 7, 9, 11, 13

Add 1 and 13
3 and 11, etc


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PostPosted: Sun Jan 18, 2015 10:20 pm 
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Can you write down what she did?


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PostPosted: Mon Jan 19, 2015 10:47 am 
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i wish i could draw how she did on the diagram itself but i'll write the numbers she added




13,11,9,7,5,3,1




THANKS


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PostPosted: Mon Jan 19, 2015 11:04 am 
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Now she needs to add them correctly ...


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PostPosted: Mon Jan 19, 2015 11:30 am 
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arrh ok thanks . so answer is 49m

dont know why she only added 11,9,13,7 and 3 hence 43 but her diagram shows all numbers

13,11,9,7,5,3,1


will ask her why when she gets back from school.


thanks ever so much


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PostPosted: Mon Jan 19, 2015 11:32 am 
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No problem - did she tackle it by 'undoing' the journey?


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PostPosted: Mon Jan 19, 2015 11:35 am 
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Joined: Wed Sep 17, 2014 7:07 pm
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Mittleme wrote:
i wish i could draw how she did on the diagram itself but i'll write the numbers she added: 13,11,9,7,5,3,1


I suggest that there is actually no need to add up her numbers. Her numbers are an arithmetic progression. The rule for arriving at the sum of an arithmetic progression is to multiply the middle value by the number of terms. The middle value of her numbers is 7 and the number of terms in her numbers is also 7. The sum of the progression is therefore 7 x 7 = 49.


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