How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?
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?
Choose four numbers and make two fractions. Use an Excel
spreadsheet to investigate their properties. Can you generalise?
Learn how to use logic tests to create interactive resources using
Learn how to use advanced pasting techniques to create interactive
Learn how to use the Excel functions LCM and GCD.
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
This investigation uses Excel to optimise a characteristic of
Learn how to use lookup functions to create exciting interactive
This spreadsheet highlights multiples of numbers up to 20 in
Pascal's triangle. What patterns can you see?
Use Excel to create some number pyramids. How are the numbers in the base line related to each other? Investigate using the spreadsheet.
Learn how to use Excel to create triangular arrays.
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 conditional formatting to create attractive
interactive spreadsheets in Excel.
Learn how to use composite bar charts in Excel.
Use an Excel spreadsheet to approximate a decimal using trial and
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.
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.
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
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 an Excel spreadsheet to investigate differences between four
numbers. Which set of start numbers give the longest run before
becoming 0 0 0 0?
A number of useful techniques that can extend your use of 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. . . .
Learn how to use increment buttons and scroll bars to create
interactive Excel resources.
When is 7^n + 3^n a multiple of 10? Use Excel to investigate, and
try to explain what you find out.
How much peel does an apple have?
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?
What are your chances of winning a game of tennis?
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?
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
Use Farey sequences to obtain rational approximations to irrational
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 an Excel to investigate division. Explore the relationships
between the process elements using an interactive spreadsheet.
Use an Excel spreadsheet to explore long multiplication.
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.
An Excel spreadsheet with an investigation.
Use Excel to practise adding and subtracting fractions.
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.
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 ?
Use Excel to explore multiplication of fractions.
Use Excel to investigate the effect of translations around a number
Use an interactive Excel spreadsheet to explore number in this
A simple file for the Interactive whiteboard or PC screen,
demonstrating equivalent 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?
What does this number mean ? Which order of 1, 2, 3 and 4 makes the
highest value ? Which makes the lowest ?
It's like 'Peaches Today, Peaches Tomorrow' but interestingly