What are your chances of winning a game of tennis?
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
Learn how to use lookup functions to create exciting interactive
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?
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.
How much peel does an apple have?
How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?
Use an Excel spreadsheet to approximate a decimal using trial and
Learn how to use the Excel functions LCM and GCD.
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 logic tests to create interactive resources using
This investigation uses Excel to optimise a characteristic of
Choose four numbers and make two fractions. Use an Excel
spreadsheet to investigate their properties. Can you generalise?
Learn how to use composite bar charts in Excel.
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?
Learn how to use conditional formatting to create attractive
interactive spreadsheets in Excel.
Use Excel to investigate remainders and divisors. Was your result
Use Excel to create some number pyramids. How are the numbers in the base line related to each other? Investigate using the spreadsheet.
This spreadsheet highlights multiples of numbers up to 20 in
Pascal's triangle. What patterns can you see?
A ribbon is nailed down with a small amount of slack. What is the
largest cube that can pass under the ribbon ?
Learn how to use advanced pasting techniques to create interactive
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
When is 7^n + 3^n a multiple of 10? Use Excel to investigate, and
try to explain what you find out.
Investigate factors and multiples using this interactive Excel
spreadsheet. Use the increment buttons for experimentation and
Use Excel to investigate digit sums of multiples of three. Can you
explain your findings?
Learn how to use increment buttons and scroll bars to create
interactive Excel resources.
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.
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 make a simple table using Excel.
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?
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 find sets of three numbers so that the sum of the
squares of the first two is equal to the square of the third.
With access to weather station data, what interesting questions can you investigate?
By tossing a coin one of three princes is chosen to be the next
King of Randomia. Does each prince have an equal chance of taking
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 number of useful techniques that can extend your use of Excel.
Learn how to use Excel to create triangular arrays.
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.
Use Farey sequences to obtain rational approximations to irrational
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.
However did we manage before calculators? Is there an efficient way
to do a square root if you have to do the work yourself?
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 ?
It's like 'Peaches Today, Peaches Tomorrow' but interestingly
What day of the week were you born on? Do you know? Here's a way to
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 explore long multiplication.
An Excel spreadsheet with an investigation.
Use Excel to practise adding and subtracting fractions.
What does this number mean ? Which order of 1, 2, 3 and 4 makes the
highest value ? Which makes the lowest ?