![Spot the difference](/sites/default/files/styles/medium/public/thumbnails/content-id-6067-icon.jpg?itok=EQkvCnbm)
Expanding and factorising quadratics
![Spot the difference](/sites/default/files/styles/medium/public/thumbnails/content-id-6067-icon.jpg?itok=EQkvCnbm)
![Leftovers](/sites/default/files/styles/medium/public/thumbnails/content-id-5774-icon.jpg?itok=SLDAThsw)
problem
Leftovers
Weekly Problem 26 - 2008
If $n$ is a positive integer, how many different values for the remainder are obtained when $n^2$ is divided by $n+4$?
If $n$ is a positive integer, how many different values for the remainder are obtained when $n^2$ is divided by $n+4$?
![Spinners](/sites/default/files/styles/medium/public/thumbnails/content-id-4488-icon.jpg?itok=PfMSFYEY)
![Polar Flower](/sites/default/files/styles/medium/public/thumbnails/content-id-2679-icon.jpg?itok=Tq-znkgU)
problem
Polar Flower
This polar equation is a quadratic. Plot the graph given by each
factor to draw the flower.
![Perfectly Square](/sites/default/files/styles/medium/public/thumbnails/content-id-2286-icon.png?itok=kkvW1YaN)
problem
Perfectly Square
The sums of the squares of three related numbers is also a perfect square - can you explain why?
![Pair Products](/sites/default/files/styles/medium/public/thumbnails/content-id-2278-icon.png?itok=CPRkwgjz)
problem
Pair Products
Choose four consecutive whole numbers. Multiply the first and last numbers together. Multiply the middle pair together. What do you notice?
![Multiplication Magic](/sites/default/files/styles/medium/public/thumbnails/content-99-03-15plus1-icon.jpg?itok=OeZvyyfn)
problem
Multiplication Magic
Given any 3 digit number you can use the given digits and name another number which is divisible by 37 (e.g. given 628 you say 628371 is divisible by 37 because you know that 6+3 = 2+7 = 8+1 = 9). The question asks you to explain the trick.
![Poly Fibs](/sites/default/files/styles/medium/public/thumbnails/content-04-01-15plus2-icon.jpg?itok=uD5JJF5Y)
problem
Poly Fibs
A sequence of polynomials starts 0, 1 and each poly is given by
combining the two polys in the sequence just before it. Investigate
and prove results about the roots of the polys.
![Fibonacci Factors](/sites/default/files/styles/medium/public/thumbnails/content-04-01-15plus1-icon.jpg?itok=onCCw-Yz)
problem
Fibonacci Factors
For which values of n is the Fibonacci number fn even? Which
Fibonnaci numbers are divisible by 3?
![Composite Notions](/sites/default/files/styles/medium/public/thumbnails/content-03-11-six2-icon.gif?itok=1SXrKvqU)
problem
Composite Notions
A composite number is one that is neither prime nor 1. Show that
10201 is composite in any base.