What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?

Can you rearrange the biscuits on the plates so that the three biscuits on each plate are all different and there is no plate with two biscuits the same as two biscuits on another plate?

Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?

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?

Find the frequency distribution for ordinary English, and use it to help you crack the code.

What is the greatest volume you can get for a rectangular (cuboid) parcel if the maximum combined length and girth are 2 metres?

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?

Use an Excel spreadsheet to explore long multiplication.

Use an interactive Excel spreadsheet to explore number in this exciting game!

A simple file for the Interactive whiteboard or PC screen, demonstrating equivalent fractions.

Use Excel to investigate the effect of translations around a number grid.

Use an Excel to investigate division. Explore the relationships between the process elements using an interactive spreadsheet.

Use an interactive Excel spreadsheet to investigate factors and multiples.

Use Excel to practise adding and subtracting fractions.

Use Excel to explore multiplication of fractions.

An Excel spreadsheet with an investigation.

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?

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. . . .

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?

This spreadsheet highlights multiples of numbers up to 20 in Pascal's triangle. What patterns can you see?

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 start.

With access to weather station data, what interesting questions can you investigate?

Learn how to use Excel to create triangular arrays.

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 conditional formatting to create attractive interactive spreadsheets in Excel.

Learn how to use composite bar charts 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 sequence.

Investigate factors and multiples using this interactive Excel spreadsheet. Use the increment buttons for experimentation and feedback.

Learn how to make a simple table using Excel.

This investigation uses Excel to optimise a characteristic of interest.

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 investigate remainders and divisors. Was your result predictable?

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 find sets of three numbers so that the sum of the squares of the first two is equal to the square of the third.

A number of useful techniques that can extend your use of Excel.

Learn how to use advanced pasting techniques to create interactive spreadsheets.

Learn how to use increment buttons and scroll bars to create interactive Excel resources.

Learn how to use lookup functions to create exciting interactive Excel spreadsheets.

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 approximate a decimal using trial and improvement.

When is 7^n + 3^n a multiple of 10? Use Excel to investigate, and try to explain what you find out.

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 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. . . .