Take ten sticks in heaps any way you like. Make a new heap using one from each of the heaps. By repeating that process could the arrangement 7 - 1 - 1 - 1 ever turn up, except by starting with it?
How much peel does an apple have?
Take any pair of numbers, say 9 and 14. Take the larger number,
fourteen, and count up in 14s. Then divide each of those values by
the 9, and look at the remainders.
Your school has been left a million pounds in the will of an ex-
pupil. What model of investment and spending would you use in order
to ensure the best return on the money?
The diagram illustrates the formula: 1 + 3 + 5 + ... + (2n - 1) = n² Use the diagram to show that any odd number is the difference of two squares.
A square patio was tiled with square tiles all the same size. Some
of the tiles were removed from the middle of the patio in order to
make a square flower bed, but the number of the remaining tiles. . . .
A woman was born in a year that was a square number, lived a square
number of years and died in a year that was also a square number.
When was she born?
Using an understanding that 1:2 and 2:3 were good ratios, start
with a length and keep reducing it to 2/3 of itself. Each time that
took the length under 1/2 they doubled it to get back within range.
It's like 'Peaches Today, Peaches Tomorrow' but interestingly
Use an interactive Excel spreadsheet to explore number in this
Use Excel to investigate the effect of translations around a number
A simple file for the Interactive whiteboard or PC screen,
demonstrating equivalent fractions.
If a sum invested gains 10% each year how long before it has
doubled its value?
Use an Excel spreadsheet to explore long multiplication.
Use an interactive Excel spreadsheet to investigate factors and
A ribbon is nailed down with a small amount of slack. What is the
largest cube that can pass under the ribbon ?
With access to weather station data, what interesting questions can you investigate?
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?
Euler found four whole numbers such that the sum of any two of the
numbers is a perfect square. Three of the numbers that he found are
a = 18530, b=65570, c=45986. Find the fourth number, x. You. . . .
What day of the week were you born on? Do you know? Here's a way to
Use Excel to practise adding and subtracting fractions.
However did we manage before calculators? Is there an efficient way
to do a square root if you have to do the work yourself?
A group of interactive resources to support work on percentages Key
Use an Excel to investigate division. Explore the relationships
between the process elements using an interactive spreadsheet.
A fire-fighter needs to fill a bucket of water from the river and
take it to a fire. What is the best point on the river bank for the
fire-fighter to fill the bucket ?.
Use an Excel spreadsheet to approximate a decimal using trial and
In how many ways can a pound (value 100 pence) be changed into some combination of 1, 2, 5, 10, 20 and 50 pence coins?
An Excel spreadsheet with an investigation.
Start with two numbers and generate a sequence where the next number is the mean of the last two numbers...
What does this number mean ? Which order of 1, 2, 3 and 4 makes the
highest value ? Which makes the lowest ?
If you take two integers and look at the difference between the
square of each value, there is a nice relationship between the
original numbers and that difference. Can you find the pattern
using. . . .
Learn how to use advanced pasting techniques to create interactive
Use an Excel spreadsheet to investigate differences between four
numbers. Which set of start numbers give the longest run before
becoming 0 0 0 0?
Use Excel to explore multiplication of fractions.
This investigation uses Excel to optimise a characteristic of
Learn how to use composite bar charts in Excel.
Substitute -1, -2 or -3, into an algebraic expression and you'll
get three results. Is it possible to tell in advance which of those
three will be the largest ?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
An aluminium can contains 330 ml of cola. If the can's diameter is
6 cm what is the can's height?
Learn how to use increment buttons and scroll bars to create
interactive Excel resources.
A plastic funnel is used to pour liquids through narrow apertures.
What shape funnel would use the least amount of plastic to
manufacture for any specific volume ?
A heap of beads was shared out by a professional bead sharer. Use
the information given to find out how many beads there were at the
Investigate factors and multiples using this interactive Excel
spreadsheet. Use the increment buttons for experimentation and
Learn how to make a simple table using Excel.
What is the greatest volume you can get for a rectangular (cuboid)
parcel if the maximum combined length and girth are 2 metres?
I have an unlimited supply of planks, of lengths 7 and 9 units.
Putting planks end to end, what total lengths can be achieved? Use
Excel to investigate.
Learn how to use lookup functions to create exciting interactive
Use Excel to investigate digit sums of multiples of three. Can you
explain your findings?
Use Excel to investigate remainders and divisors. Was your result
Learn how to use the Excel functions LCM and GCD.