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.
Relate these algebraic expressions to geometrical diagrams.
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.
Take any two numbers between 0 and 1. Prove that the sum of the numbers is always less than one plus their product?
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.
To find the integral of a polynomial, evaluate it at some special points and add multiples of these values.
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.
Can you find the value of this function involving algebraic fractions for x=2000?
By considering powers of (1+x), show that the sum of the squares of the binomial coefficients from 0 to n is 2nCn
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?
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.
Prove that the product of the sum of n positive numbers with the sum of their reciprocals is not less than n^2.
Five equations... five unknowns... can you solve the system?
If x + y = -1 find the largest value of xy by coordinate geometry, by calculus and by algebra.
Can you fit polynomials through these points?
For which values of n is the Fibonacci number fn even? Which Fibonnaci numbers are divisible by 3?
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.
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?
An algebra task which depends on members of the group noticing the needs of others and responding.
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. . . .
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?
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.
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. . . .
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.
What is the value of the integers a and b where sqrt(8-4sqrt3) = sqrt a - sqrt b?
Find all the solutions to the this equation.
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.
Can you prove that twice the sum of two squares always gives the sum of two squares?
Can you show that you can share a square pizza equally between two people by cutting it four times using vertical, horizontal and diagonal cuts through any point inside the square?
Find all the ways of placing the numbers 1 to 9 on a W shape, with 3 numbers on each leg, so that each set of 3 numbers has the same total.
Many numbers can be expressed as the difference of two perfect squares. What do you notice about the numbers you CANNOT make?
Jo made a cube from some smaller cubes, painted some of the faces of the large cube, and then took it apart again. 45 small cubes had no paint on them at all. How many small cubes did Jo use?
Show that all pentagonal numbers are one third of a triangular number.
Pick a square within a multiplication square and add the numbers on each diagonal. What do you notice?
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.
Can you find a rule which relates triangular numbers to square numbers?
Can you find a rule which connects consecutive triangular numbers?
Label this plum tree graph to make it totally magic!
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.
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 ?
First of all, pick the number of times a week that you would like to eat chocolate. Multiply this number by 2...
This article explains how to make your own magic square to mark a special occasion with the special date of your choice on the top line.
Account of an investigation which starts from the area of an annulus and leads to the formula for the difference of two squares.
Attach weights of 1, 2, 4, and 8 units to the four attachment points on the bar. Move the bar from side to side until you find a balance point. Is it possible to predict that position?
How to build your own magic squares.
Brian swims at twice the speed that a river is flowing, downstream from one moored boat to another and back again, taking 12 minutes altogether. How long would it have taken him in still water?
How good are you at finding the formula for a number pattern ?
Charlie likes tablecloths that use as many colours as possible, but insists that his tablecloths have some symmetry. Can you work out how many colours he needs for different tablecloth designs?
Polygons drawn on square dotty paper have dots on their perimeter (p) and often internal (i) ones as well. Find a relationship between p, i and the area of the polygons.