Can you fit polynomials through these points?
Given any two polynomials in a single variable it is always possible to eliminate the variable and obtain a formula showing the relationship between the two polynomials. Try this one.
Find relationships between the polynomials a, b and c which are polynomials in n giving the sums of the first n natural numbers, squares and cubes respectively.
Find all positive integers a and b for which the two equations: x^2-ax+b = 0 and x^2-bx+a = 0 both have positive integer solutions.
An algebra task which depends on members of the group noticing the needs of others and responding.
Take a few whole numbers away from a triangle number. If you know the mean of the remaining numbers can you find the triangle number and which numbers were removed?
To break down an algebraic fraction into partial fractions in which all the denominators are linear and all the numerators are constants you sometimes need complex numbers.
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.
Five equations... five unknowns... can you solve the system?
Prove that the product of the sum of n positive numbers with the sum of their reciprocals is not less than n^2.
For which values of n is the Fibonacci number fn even? Which Fibonnaci numbers are divisible by 3?
Show that for natural numbers x and y if x/y > 1 then x/y>(x+1)/(y+1}>1. Hence prove that the product for i=1 to n of [(2i)/(2i-1)] tends to infinity as n tends to infinity.
The sum of any two of the numbers 2, 34 and 47 is a perfect square. Choose three square numbers and find sets of three integers with this property. Generalise to four integers.
Take any two numbers between 0 and 1. Prove that the sum of the numbers is always less than one plus their product?
What is the value of the integers a and b where sqrt(8-4sqrt3) = sqrt a - sqrt b?
Take a complicated fraction with the product of five quartics top and bottom and reduce this to a whole number. This is a numerical example involving some clever algebra.
A, B & C own a half, a third and a sixth of a coin collection. Each grab some coins, return some, then share equally what they had put back, finishing with their own share. How rich are they?
If x + y = -1 find the largest value of xy by coordinate geometry, by calculus and by algebra.
Relate these algebraic expressions to geometrical diagrams.
Can you find the value of this function involving algebraic fractions for x=2000?
To find the integral of a polynomial, evaluate it at some special points and add multiples of these values.
Given a set of points (x,y) with distinct x values, find a polynomial that goes through all of them, then prove some results about the existence and uniqueness of these polynomials.
The nth term of a sequence is given by the formula n^3 + 11n . Find the first four terms of the sequence given by this formula and the first term of the sequence which is bigger than one million. . . .
By considering powers of (1+x), show that the sum of the squares of the binomial coefficients from 0 to n is 2nCn
Find all the triples of numbers a, b, c such that each one of them plus the product of the other two is always 2.
By proving these particular identities, prove the existence of general cases.
Find all the solutions to the this equation.
Show there are exactly 12 magic labellings of the Magic W using the numbers 1 to 9. Prove that for every labelling with a magic total T there is a corresponding labelling with a magic total 30-T.
Choose four consecutive whole numbers. Multiply the first and last numbers together. Multiply the middle pair together. What do you notice?
Can you prove that twice the sum of two squares always gives the sum of two squares?
The incircles of 3, 4, 5 and of 5, 12, 13 right angled triangles have radii 1 and 2 units respectively. What about triangles with an inradius of 3, 4 or 5 or ...?
If you know the perimeter of a right angled triangle, what can you say about the area?
How to build your own magic squares.
Robert noticed some interesting patterns when he highlighted square numbers in a spreadsheet. Can you prove that the patterns will continue?
Can you explain what is going on in these puzzling number tricks?
Janine noticed, while studying some cube numbers, that if you take three consecutive whole numbers and multiply them together and then add the middle number of the three, you get the middle number. . . .
Account of an investigation which starts from the area of an annulus and leads to the formula for the difference of two squares.
What is special about the difference between squares of numbers adjacent to multiples of three?
Many numbers can be expressed as the difference of two perfect squares. What do you notice about the numbers you CANNOT make?
A point moves around inside a rectangle. What are the least and the greatest values of the sum of the squares of the distances from the vertices?
There are unexpected discoveries to be made about square numbers...
Label this plum tree graph to make it totally magic!
In turn 4 people throw away three nuts from a pile and hide a quarter of the remainder finally leaving a multiple of 4 nuts. How many nuts were at the start?
There is a particular value of x, and a value of y to go with it, which make all five expressions equal in value, can you find that x, y pair ?
This pattern of six circles contains three unit circles. Work out the radii of the other three circles and the relationship between them.
Two semi-circles (each of radius 1/2) touch each other, and a semi-circle of radius 1 touches both of them. Find the radius of the circle which touches all three semi-circles.
Two motorboats travelling up and down a lake at constant speeds leave opposite ends A and B at the same instant, passing each other, for the first time 600 metres from A, and on their return, 400. . . .
My train left London between 6 a.m. and 7 a.m. and arrived in Paris between 9 a.m. and 10 a.m. At the start and end of the journey the hands on my watch were in exactly the same positions but the. . . .
The sums of the squares of three related numbers is also a perfect square - can you explain why?
The heptathlon is an athletics competition consisting of 7 events. Can you make sense of the scoring system in order to advise a heptathlete on the best way to reach her target?