# maths coursework

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17 years ago
#1
can anyone please help me I am doing a peice of maths course work about the number patterns in 10x10 numbers squares and I don't know wot 2 do.
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17 years ago
#2
Hi Bob,

Welcome to UK-Learning.

It may help if you can copy and paste your entire question so that everyone here can maybe give you a helping hand or point you in the direction of some useful resource.

Dave.
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17 years ago
#3
im dion that 1too, its hard
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17 years ago
#4
Im doing that work to. i find it hard to understand
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17 years ago
#5
is the coursework with the 10 x 10 grid numbered 1-100 with the 2x2 box. around numbers 12, 13, 22 and 23

I am struggling with this

you have to find the product of the top left no and bottom right no in the 2x2 box

then do the same with the top right and bottom left numbers.

then calculate the difference between the products and investigate further.

Anyone got any help on this
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17 years ago
#6
formula for any square on a 10 by 10 grid: 10(n-1)²
where n= length of side

formula for any rectangle on a 10 by 10 grid: 10(l-1)(w-1)

i hope that helps!

does anyone know how to prove the second formula?

Nat
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17 years ago
#7
Originally posted by Unregistered
formula for any square on a 10 by 10 grid: 10(n-1)²
where n= length of side

formula for any rectangle on a 10 by 10 grid: 10(l-1)(w-1)

i hope that helps!

does anyone know how to prove the second formula?

Nat
What's the second formula again?
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17 years ago
#8
The second formula is for any sized rectangle on a 10 by 10 grid:

it's: 10*(l-1)*(w-1)

where l=length of rectangle and w=width of rectangle

Nat
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17 years ago
#9
Hey this piece of coursework is hard lol. You have to try and find the general rule for all squares and rectangles. The formula for all squares is 10(n-1)2. The formula for any rectangles is 10(L-1)(w-1).

Hope this helps u all well see ya
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17 years ago
#10
i'm having de same problem i haven't got a clue how to proove the formula
g(w-1)(h-1) grid=size of grid, w=width and l=length
can ne1 help me proove that formula i'd really appreciate it
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17 years ago
#11
You've got no hope of getting any marks if you can't prove it [*deleted by editors*]
a disgruntled teacher

i'll tell you for a fiver (disgruntled but poor!)
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17 years ago
#12
Hi

Consider the following:

the top left corner of your rectangle as N
top right corner as N+L-1 (where L is the length of top side)
bottom left as N+G(H-1) (where G is grid size ie 10 in your case and H is height of left side)
bottom right as N+G(H-1)+(L-1) (ie the bottom left + length-1)

Now the hard bit

Now multiply top right by bottom left and subtract the top left multiplied by the bottom right. Careful with the brackets and remember BODMAS.

((N+L-1) x (N+G(H-1))) - (N x (N+G(H-1)+(L-1)))

You should get G(L-1)(H-1).....................

Regards
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17 years ago
#13
Helo bob

Could u plz send me that Mayfield course wrk on heights and weights as ive got another 2 course wrks that ive gotta do, science and geography!!!!!!!!!!!!!!

plz help me as quick as u can al be very gratefull cheers....
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17 years ago
#14
hey guys, is this called number gridcoursework coz dats wot mines called.
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17 years ago
#15
for the number grid u basically say

How row length of grid matters ?
how box starting point matters ?
How box length matters ?
and how box height matters?

e.g so if we do it in algebra

take S to be starting number in box square 1
R to be row length
H to be box height
L to be box length

So the two algebra equations are
S x ( S+HR+L)
( S+L)x(S+HR)

these then work out as
SxS +SLR + SL
SxS + SLR + SL +LHR

so the difference is always the LxHxR ( Row length x Box height x box length)

Hope this helps

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17 years ago
#16
how do you graph the results? for the number grid coursework
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17 years ago
#17
Graphing the results is not the thing...too many dimensions are required.
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17 years ago
#18
Paste the whole problem as you got it lol, everything you have said i can't undertand - more detail
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17 years ago
#19
Originally posted by Unregistered
formula for any square on a 10 by 10 grid: 10(n-1)²
where n= length of side

formula for any rectangle on a 10 by 10 grid: 10(l-1)(w-1)

i hope that helps!

Nat
'formula' of what? what exactly is 10(n-1)² suppost to prove for a square?
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17 years ago
#20
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