Go to navigation
It is currently Fri Dec 02, 2016 8:11 pm

All times are UTC




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Three groups of numbers
PostPosted: Sat Jul 16, 2011 5:49 pm 
Offline

Joined: Mon Mar 15, 2010 2:45 pm
Posts: 4598
My DS & I are struggling with the type

X(y)z A(b)c d(?)f

Has anyone posted a logical approach to this that we can follow. I will ask his tutor to go through it with me next week, but in the meantime one of his questions is beating me!


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 5:59 pm 
Offline

Joined: Sat Feb 13, 2010 11:02 pm
Posts: 420
let us know what the question is then!


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 6:10 pm 
Offline

Joined: Fri Nov 17, 2006 8:54 pm
Posts: 1770
Location: caversham
(e) :lol:

Have a look here.


viewtopic.php?f=3&t=3740

viewtopic.php?f=3&t=20671

Probably one of the hardest type of question as it involves a good grounding in KS2 maths and a bit of trial and error..........on a personal level I can crack them in the morning but not late in the evening.


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 6:44 pm 
Offline

Joined: Mon Mar 15, 2010 2:45 pm
Posts: 4598
Thanks - they are the only type he really has trouble with I'm worried he will get bogged down with them. The first one we had trouble with was:

25(50)5 24(40)6 27( )3

I think this one is divide the number on the left by the one on the right and add 10 (took about 10 mins to get that!)

The second one is:

6(15)11 9(16)15 4( )11

I will be embarrassed when someone shows me how easy it is :oops: :oops:


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 7:04 pm 
Offline

Joined: Sat Feb 13, 2010 11:02 pm
Posts: 420
scary mum wrote:
25(50)5 24(40)6 27( )3


using the format a(c)b

c=a/b*10 (the left number divided by the right number multiplied by 10)

so I make the answer 90


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 7:12 pm 
Offline

Joined: Mon Mar 15, 2010 2:45 pm
Posts: 4598
Yes, sorry I got that one, I just didn't put the answer!! I wrote add 10 instead of multiply by- sorry! And the other one? :D


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 7:35 pm 
Offline

Joined: Tue Jun 02, 2009 9:28 pm
Posts: 2439
I think the answer is 17.

Ie. a(b)c.

b = (c-a) + 10


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 7:37 pm 
Offline

Joined: Mon Mar 15, 2010 2:45 pm
Posts: 4598
Thank you. It all looks so simple when you see it. :lol:


Top
 Profile  
 
PostPosted: Sat Jul 16, 2011 7:44 pm 
Offline

Joined: Thu Mar 04, 2010 2:51 pm
Posts: 1034
The second one, you take the left number from the right one and add ten. 11-6=5 5 + 10=15.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
CALL 020 8204 5060
   
Privacy Policy | Refund Policy | Disclaimer | Copyright © 2004 – 2016