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 Post subject: I'm being stupid, aren't I? Please explain this one!Posted: Wed Apr 18, 2012 7:54 pm

Joined: Wed Mar 09, 2011 2:22 pm
Posts: 710
4 (12) 36 2 (6) 18

5 ( ) 45

I just can't see it!!

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 Posted: Wed Apr 18, 2012 8:03 pm

Joined: Tue Oct 27, 2009 8:19 pm
Posts: 6563
Ok time to make myself look a fool

4 x 3 = (12) x 3 = 36
2 x 3 = (6) x 3 = 18

so...

5 (9) 45

Just for starter as I'm sure it's wrong but I don't mind giving people a laugh!!

Actually looking at it again it is wrong isn't it?

and just to prove to people why my DS needs a tutor!!

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 Posted: Wed Apr 18, 2012 8:13 pm

Joined: Fri Oct 21, 2011 2:49 pm
Posts: 263
Hi Doodles and Manana

It looked like gobbledygook to me when I first saw it I'm not sure I understand the question - but now hanging on to glory via Doodle's coat tails the examples were multiplied up in a two stage process, but missed doing it on the actual question

So 5 x 3 = 15 and then 15 x 3 = 45

So 5 (15) 45

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 Posted: Wed Apr 18, 2012 8:19 pm

Joined: Mon Jan 30, 2006 4:07 pm
Posts: 2661
Manana wrote:
4 (12) 36 2 (6) 18

5 ( ) 45

I just can't see it!!

The numbers either side of the brackets are used to make the number inside the brackets. Sometimes you only have to use 1 operation, sometimes 2 and sometimes 3.

36 minus 4 = 32
How do you get from 32 to 12 = minus 20 [left x 5]

18 minus 2 = 16
How do you get from 16 to 6 = minus 10 [left x 5]

45 minus 5 = 40
40 minus 25 [left x 5] = 15

Patricia

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 Posted: Wed Apr 18, 2012 8:19 pm

Joined: Tue Oct 27, 2009 8:19 pm
Posts: 6563
So if I had followed my own process I would have got the same answer as you. Story of my life really!!!!!!

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 Posted: Wed Apr 18, 2012 8:56 pm

Joined: Fri May 25, 2007 10:22 am
Posts: 955
For: A (B) C

B = A * 3
C = A * 9

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 Posted: Wed Apr 18, 2012 9:23 pm

Joined: Sun Jan 13, 2008 6:18 pm
Posts: 238
Location: Gloucestershire
For: A (B) C

A = B/3
A = C/9
------------
B = A x 3
B = C/3
------------
C = A x 9
C = B x 3

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 Posted: Wed Apr 18, 2012 9:25 pm

Joined: Wed Oct 12, 2011 8:34 pm
Posts: 943
programmer wrote:
For: A (B) C

B = A * 3
C = A * 9

Now that is rather neat
where is that "Like" button??

do we know for definite 15 is the answer?

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 Posted: Wed Apr 18, 2012 9:38 pm

Joined: Tue Sep 27, 2011 1:21 pm
Posts: 67
Hello
For A(B)C
In this case B=2xA+C/9
hope it makes sense.
Thanks

Last edited by wellprepared on Wed Apr 18, 2012 9:41 pm, edited 1 time in total.

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 Posted: Wed Apr 18, 2012 9:52 pm

Joined: Sun Jan 13, 2008 6:18 pm
Posts: 238
Location: Gloucestershire
DC17C - Of course it's 15!

With respect, Patricia, doesn't your method over-complicate things?

wellprepared - but that's not true!

If B=2xA+C/2
Then 5 ( ) 45 would be 5 (32.5) 45
Or have I lost the plot?!

Ah, you have since changed your equation!

Last edited by Orson on Wed Apr 18, 2012 9:55 pm, edited 1 time in total.

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