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 ?
Kyle and his teacher disagree about his test score - who is right?
How to build your own magic squares.
Balance the bar with the three weight on the inside.
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.
The squares of any 8 consecutive numbers can be arranged into two sets of four numbers with the same sum. True of false?
Can you find the lap times of the two cyclists travelling at constant speeds?
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?
Take any two numbers between 0 and 1. Prove that the sum of the numbers is always less than one plus their product?
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?
A task which depends on members of the group noticing the needs of others and responding.
An algebra task which depends on members of the group noticing the needs of others and responding.
Choose four consecutive whole numbers. Multiply the first and last numbers together. Multiply the middle pair together. What do you notice?
Use algebra to reason why 16 and 32 are impossible to create as the sum of consecutive numbers.
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. . . .
Given an equilateral triangle inside an isosceles triangle, can you find a relationship between the angles?
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 ?
A 2-Digit number is squared. When this 2-digit number is reversed and squared, the difference between the squares is also a square. What is the 2-digit number?
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.
Robert noticed some interesting patterns when he highlighted square numbers in a spreadsheet. Can you prove that the patterns will continue?
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?
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?
If a sum invested gains 10% each year how long before it has doubled its value?
Jo has three numbers which she adds together in pairs. When she does this she has three different totals: 11, 17 and 22 What are the three numbers Jo had to start with?”
Manufacturers need to minimise the amount of material used to make their product. What is the best cross-section for a gutter?
Account of an investigation which starts from the area of an annulus and leads to the formula for the difference of two squares.
Let S1 = 1 , S2 = 2 + 3, S3 = 4 + 5 + 6 ,........ Calculate S17.
A cyclist and a runner start off simultaneously around a race track each going at a constant speed. The cyclist goes all the way around and then catches up with the runner. He then instantly turns. . . .
A mother wants to share a sum of money by giving each of her children in turn a lump sum plus a fraction of the remainder. How can she do this in order to share the money out equally?
Fifteen students had to travel 60 miles. They could use a car, which could only carry 5 students. As the car left with the first 5 (at 40 miles per hour), the remaining 10 commenced hiking along the. . . .
Label this plum tree graph to make it totally magic!
Triangle ABC is an equilateral triangle with three parallel lines going through the vertices. Calculate the length of the sides of the triangle if the perpendicular distances between the parallel. . . .
What would you get if you continued this sequence of fraction sums? 1/2 + 2/1 = 2/3 + 3/2 = 3/4 + 4/3 =
The well known Fibonacci sequence is 1 ,1, 2, 3, 5, 8, 13, 21.... How many Fibonacci sequences can you find containing the number 196 as one of the terms?
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. . . .
What are the possible dimensions of a rectangular hallway if the number of tiles around the perimeter is exactly half the total number of tiles?
If a two digit number has its digits reversed and the smaller of the two numbers is subtracted from the larger, prove the difference can never be prime.
However did we manage before calculators? Is there an efficient way to do a square root if you have to do the work yourself?
In a snooker game the brown ball was on the lip of the pocket but it could not be hit directly as the black ball was in the way. How could it be potted by playing the white ball off a cushion?
A moveable screen slides along a mirrored corridor towards a centrally placed light source. A ray of light from that source is directed towards a wall of the corridor, which it strikes at 45 degrees. . . .
Show that all pentagonal numbers are one third of a triangular number.
The sums of the squares of three related numbers is also a perfect square - can you explain why?
Can you find a rule which relates triangular numbers to square numbers?
Find the five distinct digits N, R, I, C and H in the following nomogram
Show that if you add 1 to the product of four consecutive numbers the answer is ALWAYS a perfect square.
What is the total number of squares that can be made on a 5 by 5 geoboard?
This shape comprises four semi-circles. What is the relationship between the area of the shaded region and the area of the circle on AB as diameter?
Pick a square within a multiplication square and add the numbers on each diagonal. What do you notice?