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 Post subject: Question type 19
PostPosted: Mon Jul 21, 2008 9:53 am 
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Joined: Thu Jun 26, 2008 9:57 pm
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Please, help with the questions below:

6(100)18 5(132)28 4(...)21

21(30)1 20(11)10 16(...)12

Thanks,

aotearoa


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 Post subject:
PostPosted: Mon Jul 21, 2008 9:58 am 
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Location: Warwickshire.
The first series is multiply the numbers either side of the brackets then subtract 8 each time.
(6 x 18 ) - 8
(5 x 28 ) - 8
etc
so (4 x 21) - 8 = 76
have not looked at the next one yet.


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 Post subject:
PostPosted: Mon Jul 21, 2008 10:19 am 
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Location: Warwickshire.
Right, the next one is subtract the number to the right of the bracket from the number to the left of the bracket then add 1.
So (16 - 12) + 1 = 5


EDIT: Ignore this, I am wrong!!


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 Post subject:
PostPosted: Mon Jul 21, 2008 10:27 am 
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thanks Ed's mum...
and the next one?
My husband find this one, just few mins ago...but the second one...no way...we think is a mistake somehow...


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 Post subject:
PostPosted: Mon Jul 21, 2008 10:30 am 
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your logic is good, but what about first group 21-1+1...is not 30..


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 Post subject:
PostPosted: Mon Jul 21, 2008 10:41 am 
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Location: Warwickshire.
Yes, I apologise! Will look again!!


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 Post subject:
PostPosted: Mon Jul 21, 2008 10:41 am 
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Hi aotearoa

As for 6(100)18 5(132)28 4(...)21

16 X 8 = 108
108 - 8 = 100

28 X 5 = 140
140 - 8 = 132

So 21 X 4 = 84
and 84 - 8 = 76

I'll have a look at the 2nd one and see if I can work it out.

Thanks
Sati


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 Post subject:
PostPosted: Mon Jul 21, 2008 10:45 am 
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Location: Warwickshire.
We got that one already! Hopefully you can work the other one out! :mrgreen:


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 Post subject:
PostPosted: Mon Jul 21, 2008 11:00 am 
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Ed's mum wrote:
We got that one already! Hopefully you can work the other one out! :mrgreen:


sorry, is one mistake:

there is 2 instead of 12, in last group of the series
so, is:
21(30)1 20(11)10 16(...)2

sorry
is hard, anyway...


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 Post subject:
PostPosted: Mon Jul 21, 2008 11:02 am 
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That makes sense

(21/1) + 9 = 30
(20/10) + 9 = 11
(16/2) + 9 = 17


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