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 Post subject: Bond's How to do 11+ VRPosted: Tue Mar 17, 2009 3:36 pm

Joined: Sat Nov 08, 2008 4:30 pm
Posts: 33
Location: Birmingham
Question 73 of the pull-out test,

--88 65 -- 58 22 51

The answer given was 72 and 44. But my son says 72 and 55 is also correct, his argument is 22+33=55, and 55+33 is 88 on the reverse order. This means that the question has more than one answer but Bond has not identified that. Can someone tell us the above argument is correct?
Thanks

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 Post subject: Posted: Tue Mar 17, 2009 4:20 pm

Joined: Tue Oct 28, 2008 6:41 pm
Posts: 133
Location: Surrey
Hmm, I should think that Bond were ignorant of the fact there were 2 answers. I wouldn't fret over it; in the real 11+ you would never expect to find anything like double answers, etc.
Maybe if they put another number before the 72 then it would clarify the answer. Don't worry too much about it.

LQ

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 Post subject: Posted: Tue Mar 17, 2009 9:10 pm

Joined: Tue Sep 16, 2008 7:30 pm
Posts: 139
Can I ask if that was a multiple choice question or standard type one?

Looking at the question, on the 88 __ 22 series, the obvious logic that would come to mind is the doubling though adding 33 to 22 would get 55 and so on.

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 Post subject: Posted: Tue Mar 17, 2009 9:18 pm

Joined: Sat Nov 08, 2008 4:30 pm
Posts: 33
Location: Birmingham
its a standard question.

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 Post subject: Posted: Wed Mar 18, 2009 9:18 am

Joined: Wed Mar 11, 2009 4:21 pm
Posts: 45
Location: London
Hello Kevin8,

The answer on the book is correct.

Q 73: fill in the number in sequence: __ 88 65 __ 58 22 51

Aswer:

58 - 51 = 7 ( so for every other number you add 7)

Say 58 + 7 = 65 & 65 + 7 = 72

then for the other number you look for a common partern
i.e. 22 __ 88

so double 22 = 44 & double 44 = 88 and so on

hence the answer 72 & 44

look on page 66 on How to do 11+ VB, for some more examples.

hope this helps.

_________________
Thanks... 2010mum

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 Post subject: Posted: Thu Mar 19, 2009 7:05 pm

Joined: Tue Oct 28, 2008 6:41 pm
Posts: 133
Location: Surrey
2010 Mum,

Your theory still does not explain properly.
As you said, you must find a common pattern.
Kevin8's son suggested 55 as 22 + 33 = 55 and 55 + 33 = 88.
That too is a common difference (+33).

How would you clarify that?

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 Post subject: Posted: Thu Mar 19, 2009 10:12 pm

Joined: Sat Nov 08, 2008 4:30 pm
Posts: 33
Location: Birmingham
I think addtion is the order of the question ( +7, +33). Add and double doesn't sound a correct sequece to me.

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 Post subject: Posted: Fri Mar 20, 2009 7:51 am

Joined: Mon Jan 30, 2006 4:07 pm
Posts: 2660
Dear All

Both are valid answers, using the 'every other one' technique.

72 ............ 88 .............. 65........... 44.........58.........22............51

72 miss one subtract 7 = 65
65 miss one subtract 7 = 58
58 miss one subtract 7 = 51

88 miss one and half = 44
44 miss one and half = 22

72 ............ 88 .............. 65........... 55.........58.........22............51

72 miss one subtract 7 = 65
65 miss one subtract 7 = 58
58 miss one subtract 7 = 51

88 miss one subtract 33 = 55
55 miss one subtract 33 = 22

Out of interest Kevin, which area of the country are you looking at? Is Bond relevant to the school / area you are applying for?

Patricia

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 Post subject: Posted: Fri Mar 20, 2009 8:26 am

Joined: Mon Jan 30, 2006 4:07 pm
Posts: 2660
kevin8 wrote:
I think addtion is the order of the question ( +7, +33). Add and double doesn't sound a correct sequece to me.

Dear Kevin

Sequences can use all 4 operations, in a number of ways...

+ 2 x 3

-5 and double

+7 - 2 + 3 [groups of 3 then start again] +7 - 2 +3

divide by 3 then + 7

Using the above but using alternate numbers.

Fibonacci code [the previous 2 numbers add up to the 3rd]

Square numbers 3 9 4 16 5 25 6 ?

etc etc

Take a look at the Tutors free download, they give a number of examples for sequences....

Patricia

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 Post subject: Posted: Fri Mar 20, 2009 11:24 am

Joined: Wed Mar 11, 2009 4:21 pm
Posts: 45
Location: London
Hello Patricia,

patricia wrote:
[72 ............ 88 .............. 65........... 44.........58.........22............51

72 miss one subtract 7 = 65
65 miss one subtract 7 = 58
58 miss one subtract 7 = 51

88 miss one and half = 44
44 miss one and half = 22

this format gives a better explanation

_________________
Thanks... 2010mum

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