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Posted: Sat Dec 29, 2012 12:32 pm
by mickg
If A + B = 76
A - B = 38
A divided by B = ?
Posted: Sat Dec 29, 2012 12:52 pm
by Carberry
Scroll down if you want to see my answer and working
A/ B = 3
A + B = 76 (1)
A - B = 38
A = 38 + B (2)
sub (2) in to (1)
(38+B) + b = 76
2B + 38 = 76
2B = 38
B = 19
A + (19) = 76
A = 57
A divided by B
57 / 19 = 3
What's my prize?
Posted: Sat Dec 29, 2012 12:58 pm
by Bob_A
Add A + B = 76 and A - B = 38
A+A+B-B=76+38 equals
2A = 114
Therefore A=57 which means B must be 19
So A divided by B as Carberry correctly says is 3
Edit
Just noticed Carberry done the working out while I was doing mine :p
Posted: Sat Dec 29, 2012 2:09 pm
by rimexboy
I've got a headache 
Posted: Sat Dec 29, 2012 2:20 pm
by local patios and driveway
Is it C?
Posted: Sat Dec 29, 2012 6:25 pm
by lutonlagerlout
at a quick glance surely the answer is 1?
38 +38 is 76
so 38/38 is 1
i think
LLL
Posted: Sat Dec 29, 2012 6:32 pm
by haggistini
I'm with lll
Posted: Sat Dec 29, 2012 6:33 pm
by mickg
triple L - of all the people I would of thought you would of got this one right
the answer is 3 so Carberry and bob get the pat on the back 
Posted: Mon Dec 31, 2012 4:27 pm
by lutonlagerlout
30 years since i did algebra mick
if it doesnt involve money or setting out then i CBA with much maths
can you show how it works please?
LLL
Posted: Mon Dec 31, 2012 4:33 pm
by dig dug dan
There is a reason why its been 30 years, that's because algebra has no use to anyone other than on university challenge.
Lll is right. Its 1
Posted: Mon Dec 31, 2012 7:06 pm
by sussex
You boys have had to much time off,you need to be back working if all you have to do is algebra.Thats nearly as bad........no IS as bad as watching soaps.Happy New Year .
Posted: Mon Dec 31, 2012 7:19 pm
by Tony McC
Algebra may seem irrelevant, Dan, but I've whiled away at least an hour this evening preparing a drawing to explain "Streetmasonry Geometry". Isn't it amazing what we'll find to do when we have no real work and Cabin Fever has well and truly set-in!
I got fed-up with having to explain the concept of 'tangent points' to DIYers, and even some so-called contractors, so I decided to do it all pictorially.
It might be a day or two before I upload it though....
Posted: Mon Dec 31, 2012 7:32 pm
by sussex
Point taken boss..........
Posted: Mon Dec 31, 2012 7:42 pm
by dig dug dan
That's told me
Posted: Mon Dec 31, 2012 8:03 pm
by Carberry
sussex wrote:You boys have had to much time off,you need to be back working if all you have to do is algebra.Thats nearly as bad........no IS as bad as watching soaps.Happy New Year .
Algebra was just there to show the working. I looked at the question and knew the answer right away 
I'm a super nerd though :laugh: