Start with two numbers. This is the start of a sequence. The next
number is the average of the last two numbers. Continue the
sequence. What will happen if you carry on for ever?
An Excel spreadsheet with an investigation.
Use an interactive Excel spreadsheet to explore number in this
Use Excel to investigate the effect of translations around a number
Use an Excel spreadsheet to explore long multiplication.
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 ribbon is nailed down with a small amount of slack. What is the
largest cube that can pass under the ribbon ?
Use Excel to practise adding and subtracting fractions.
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 ?
Use Excel to explore multiplication of fractions.
Use an interactive Excel spreadsheet to investigate factors and
What is the greatest volume you can get for a rectangular (cuboid)
parcel if the maximum combined length and girth are 2 metres?
A simple file for the Interactive whiteboard or PC screen,
demonstrating equivalent fractions.
Find the frequency distribution for ordinary English, and use it to help you crack the code.
Use Excel to create some number pyramids. How are the numbers in
the base line related to each other? Investigate using the
This spreadsheet highlights multiples of numbers up to 20 in
Pascal's triangle. What patterns can you see?
Learn how to use Excel to create triangular arrays.
Learn how to use conditional formatting to create attractive
interactive spreadsheets in Excel.
Take any whole number between 1 and 999, add the squares of the
digits to get a new number. Use a spreadsheet to investigate this
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. . . .
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 ?.
However did we manage before calculators? Is there an efficient way
to do a square root if you have to do the work yourself?
An aluminium can contains 330 ml of cola. If the can's diameter is
6 cm what is the can's height?
With access to weather station data, what interesting questions can you investigate?
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.
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 ?
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. . . .
Learn how to use composite bar charts in Excel.
This investigation uses Excel to optimise a characteristic of
If a sum invested gains 10% each year how long before it has
doubled its value?
Use an Excel spreadsheet to approximate a decimal using trial and
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.
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?
Learn how to use lookup functions to create exciting interactive
When is 7^n + 3^n a multiple of 10? Use Excel to investigate, and
try to explain what you find out.
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?
Investigate factors and multiples using this interactive Excel
spreadsheet. Use the increment buttons for experimentation and
Learn how to use increment buttons and scroll bars to create
interactive Excel resources.
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
Learn how to make a simple table using Excel.
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. . . .
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.
Choose four numbers and make two fractions. Use an Excel
spreadsheet to investigate their properties. Can you generalise?
Use Excel to investigate remainders and divisors. Was your result
Learn how to use the Excel functions LCM and GCD.
Learn how to use advanced pasting techniques to create interactive
Learn how to use logic tests to create interactive resources using
Use Excel to investigate digit sums of multiples of three. Can you
explain your findings?
A number of useful techniques that can extend your use of Excel.